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Two portraits from around 1910 measure 7x10 and 8x11 inches, while the bust-length profile photograph from 1932 measures 4.75x6.75 inches.

Photographs are each mounted on board and measure 8x10 and 9x11 inches. One is a duplicate.

Positive photographic portraits of John Ridlon are available in the collection.

These lantern slides contain positive images of a military-medical training camp in Plattsburgh, N.Y., where Ridlon spent some time probably in 1916. The accompanying lecture text indicates there were originally 67 lantern slides; 49 survived and are in this series. About half were created for Ridlon by the Victor Animatograph Corporation of Davenport, Iowa (founded in 1910).

Handwritten manuscript (on the reverse of "Principles and Practice of Orthopaedic Surgery," by Philip Lewin). Hugh Owen Thomas was a Welsh surgeon considered the father of orthopaedic surgery in Britain. Typed versions of the manuscript can be found in the Correspondence Series.

Bound typescript manuscript. Pages of text are mounted on to the manuscript, which is an essay by Ridlon on the congenital disorder talipes, also known as clubfoot, including illustrations of presentations of the disorder, possible treatments, and photographs of patients with the disorder.

Bound typescript manuscript with holograph notes containing writings on the general practice of orthopedics as well as diagnosis and treatment of spondylitis and scoliosis.

Bound notebook written in holograph script containing writings and collected research on cases of spondylitis including causes and cures, as well as clippings pasted in, illustrated notes laid in showing spinal curvature of patients with Ridlon's notes, and two photographs of a dissection of a patient with the disorder. Includes multiple pages of both holograph and typescript notes laid in.

8 pages, including some editorial marks.

Bound volume of 88 numbered reprints, signed by John Ridlon and dated 1925. Includes typed index of titles. Reprint #82, a paper given by Ridlon at a conference in 1917, refers to the World War I U.S. Medical Corps training camp in Plattsburgh, N.Y., featured in the photographs in this collection.

Originally part of the Trent Manuscripts Collection, John Ridlon papers.

Originally part of the Trent Manuscripts Collection, John Ridlon papers.

These documents date from Ridlon's earliest professional years, before his appointment to the Chicago Medical School. As the letters and diplomas document, Ridlon matriculated from Tufts College, and went on to serve in New York City at the New York Orthopaedic Dispensary and Hospital, St. Luke's Hospital, and Vanderbilt Clinic; he also served at Bellevue Hospital as attending surgeon of the Orthopedic Division (outpatient) from 1887-1889.

American Orthopedic Association (AOA) meeting programs, 1888, 1889, 1929; AOA banquet menus, 1899, 1906, 1909. Also includes a humorous play program and an undated business card from the N.Y. Orthopaedic Dispensary and Hospital. Also includes three copper printing plates for Ridlon's business card and other ephemeral prints. Originally part of the Trent Manuscripts Collection, John Ridlon papers.

Originally part of the Trent Manuscripts Collection, John Ridlon papers.

Originally part of the Trent Manuscripts Collection, John Ridlon papers.

Contains a copy of the proceedings of a general court martial held at R.C.A.F. Overseas Headquarters of Flight Lieutenant Percy Edward Ryberg. Ryberg was accused of knowingly allowing and promoting homosexual activities at his apartment in London, and was discharged from service. The appeal notes date from 1950 and include Ryberg's defense.