Medical Terminology Daily (MTD) is a blog sponsored by Clinical Anatomy Associates, Inc. as a service to the medical community. We post anatomical, medical or surgical terms, their meaning and usage, as well as biographical notes on anatomists, surgeons, and researchers through the ages. Be warned that some of the images used depict human anatomical specimens.

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A Moment in History

Jean-Louis Petit

Jean Louis Petit
(1674 – 1750)

French surgeon and anatomist, Jean Louis Petit was born in Paris in on March 13, 1674.  His family rented an apartment at his house to Alexis Littre (1658 – 1726), a French anatomist. Petit became an apprentice of Littre at seven years of age, helping him in the dissections for his lectures and at an early age became the assistant in charge of the anatomic amphitheater.

Because of Petit’s dedication to anatomy and medicine, in 1690 at the age of sixteen, became a disciple of a famous Paris surgeon, Castel.

In 1692, Petit entered the French army and performed surgery in two military campaigns. By 1693 he started delivering lectures and was accepted as a great surgeon, being invited to the most difficult operations.  In 1700 he was appointed Chief Surgeon of the Military School in Paris and in the same year he received the degree of Master of Surgery from the Faculty of Paris.

In 1715 he was made a member of the Royal Academy of Sciences and an honorary member of the Royal Society of London. He was appointed by the King as the first Director General of the Royal Academy of Surgery when it was founded in 1731.

Petit’s written works are of historical importance.  “Traite des Maladies des Os” ( A Treatise on Bone Diseases);  “Traite des Maladies Chirurgicales et des Operation” (A Treatise on Surgical Diseases and their Operations” This last book was published posthumously in 1774. He also published a monograph on hemorrhage, another on lachrymal fistula, and others.

He was one of the first to perform choIecystotomy and mastoidotomy. His original tourniquet design for amputations saved many in the battlefield and the design of the same surgical instrument today has not changed much since its invention by him.

His name is remembered in the lumbar triangle, also called the "triangle of Petit", and the abdominal hernia that can ensue through that area of weakness, the lumbar hernia or "Petit's hernia".

1. “Jean Louis Petit – A Sketch of his Life, Character, and Writings” Hayne, AP San Fran Western Lancet 1875 4: 446-454
2. “Oeuvres compl?tes de Jean-Louis Petit” 1837 Imprimerie de F. Chapoulaud
3. Extraits de l'eloge de Jean-Louis Petit Ius dans Ia seance publique de I' Academie royale de chirurgie du 26 mai 1750” Louis A. Chirurgie 2001: 126 : 475- 81

 "Clinical Anatomy Associates, Inc., and the contributors of "Medical Terminology Daily" wish to thank all individuals who donate their bodies and tissues for the advancement of education and research”.

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"The Anatomist" - A True Story of Gray's Anatomy

This article is part of the series "A Moment in History" where we honor those who have contributed to the growth of medical knowledge in the areas of anatomy, medicine, surgery, and medical research.

Book cover - The Anatomist by Bill Hayes
Book cover

As you know, I am interested in the history of Science, Medicine, and specially, Human Anatomy. Because of that and as part of this website we added a series called "A Moment in History". The objective was to create a series of articles to honor those individuals who have contributed to the growth of medical knowledge in the areas of anatomy, medicine, surgery, and medical research including individuals who have contributed in different ways, but still added their life work to the advancement of medical knowledge.

One of the individuals who piqued my interest was Henry Gray, FRS author of one of the great teaching books on anatomy ever written, “Gray’s Anatomy”. This book was first published in England in 1858, later published in the USA from 1862 to 1990. The English Edition is still published and is now in its 42nd Edition.

I started to look deeper into his life which, I learned with surprise, was not only very short, but obscure. Researching into Henry Gray’s life, I came about this book: “The Anatomist – A True Story of Gray’s Anatomy” by William (Bill) Hayes.

Bill Hayes started looking into Henry Gray’s life with the intent of writing a biography. He rapidly run into a wall. Besides a well-detailed list of academic titles and positions, degrees awarded, and scientific papers that he published. As the author states “what I had gathered about him would amount to little more than a Curriculum Vitae”. So, he starts a journey to uncover more data about Gray’s life and his well-known book.

Henry Gray, FRS (Public Domain)
Henry Gray, FRS

Henry Vandyke Carter, MD
Henry Vandyke Carter, MD

Part of his journey was to understand the importance of anatomy as a component of the medical curriculum. Bill Hayes was accepted as a participant in the anatomy laboratory for physical therapy students and later visited medical students in the anatomy lab. Just his observations and comments throughout the book on these activities is worth reading this book.

What is interesting is the lack of personal information on Henry Gray. To this date, we do not have information about his birth, either location or date. There is more information on his family that on the subject. Most agree that Henry Gray was born in 1827, but some propose 1825. Either way, there is no firm data. What we do know is that he died on June 12, 1861, having contracted smallpox most probably from his nephew Charles Gray. Henry Gray was 36 years old.

Henry Gray and anatomy students
Gray and students

Here is one of the few photographs that exists of Henry Gray. In this particular 1870 picture by Joseph Langhorn, Gray is in the anatomy laboratory (forefront, third from the left) at St. George’s Hospital with his students. At the time it was customary for medical students to pose in the lab with bones and cadavers. This is a practice not in use today and disappeared circa 1930. For anyone interested in this now considered gruesome custom, I would recommend the book "Dissection" by John H. Warner and James M. Edmonson.

In his research, the author discovers Henry Gray’s collaborator and illustrator of the book: Henry Vandyke Carter, MD. Where Gray is obscure and with no personal information, Henry Carter writes a diary daily, and for some time he actually writes another diary that he calls “Reflections” on more personal and religious topics. Carter is a troubled, complicated individual blessed with incredible anatomical knowledge and drawing capabilities that can be seen throughout the book.

It is because of these diaries that we know Henry Carter and we can glimpse (almost at a distance) the character of Henry Gray, but it is not enough to elucidate his biography. In some ways it is like looking at an individual through a veil. You see him, but it is nebulous.

Much of the book is concentrated on Henry Carter, his life, his depression bouts, his self doubts and the work that he did illustrating Gray’s book. In some ways he is behind the scenes, and even though he did much of the dissection work and illustration, Henry Carter is mostly unknown to the anatomical world, as in may cases the medical illustrators are, with some notable exceptions.

Henry Carter is paid only 150 pounds for his work and even before getting paid he pays for a ticket to India where he accomplishes his objectives in life and in academia. Henry Carter eventually retires and comes back to England where he dies in 1897.

Bill Hayes and his partner visited rare book libraries at different universities and eventually go to London to visit areas and locations where Henry Gray lived and worked. There is a sense of accomplishment, but also a sense that we can almost touch the life of Henry Gray but fall short of seeing him.

The book ending is poignant, dealing with personal matters and thoughts on life and death. Eventually the author is very clear that the study of anatomy, although on dead subjects who donated their bodies to the universities is actually an activity that helps us understand life.

Bill Hayes is an awarded author of seven books, a frequent contributor to the New York Times and a photographer. More information about him and his activities at

Personal note: This is a book that I personally recommend and proud to add to my personal library. My one observation is that the author should have probably name the book “The Anatomists - A True Story of Gray’s Anatomy” as it is the story of the life of the two Henrys: Gray and Carter. In fact, I believe that Gray’s Anatomy could have been called “Gray’s and Carter’s Anatomy”, had history been slightly different – Dr. Miranda.

1. “Henry Gray and Henry Vandyke Carter: Creators of a Famous Textbook" Roberts, S. J Med Biog 2000 8: 206-212
2. "Henry Gray, Anatomist: An Appreciation" Boland, F Am J Med Sci 1908 1827-1924
3. "The Anatomist: A True Story of Gray’s Anatomy" Hayes, B. Random House PG 2007