The item consists of a letter sent from John McCrae while on active duty to Carleton Noyes, Cambridge, MA, with an envelope postmarked 31 May 1916. Enclosed with the letter is an autographed signed copy of McCrae's poem, In Flanders Fields. The poem's first line in this copy ends with the word “grow,” a change from the published version in which the line finishes with “blow.” In his letter, McCrae modestly notes that the poem had achieved some level of notoriety.

Signed letter to Birkett offering manuscript of In Flanders Fields and Other Poems to the library.

Consists of 24 leaves of coloured sketches of plants, animals, and insects, including microscopic images, originally from a sketchbook or field notebook. Sketches are primarily pen and coloured ink, with some watercolour and pencil drawings. Pages are mostly detached. One page features snakeskin pasted in.

"Charles Arthur Mercier, M.D. 1852-1919," by Henry Viets. Reprinted from the Archives of Neurology and Psychiatry, November 1919, Vol. II, pp.577-579.

Letter to William Osler from J. & J. Leighton, 40, Brewer Street, Golden Square, London, England. Leighton responds to Osler's inquiry into Johann Schall. Letter pasted in Osler's copy of Johann Schall's "Eusebius Historia Ecclesiastica," 1479. Includes manuscript notes.

"Bibliotheca Osleriana. I Introduction. The Collection of a Library," by Osler.

Cushing's handwritten manuscript notes concerning publications in Osler's collection.

Cushing's handwritten manuscript notes concerning how Osler wanted his library arranged.

Letter to William Osler from T.K. Monro, 12 Somerset Place, Glasgow, Scotland. "Bibliotheca Secunda. Charles Morrison, Scots Magazine." Monro delivers a progress report on his research into the later history of Charles Morrison.