Sangster's papers include two notebooks one containing subscriptions to Hesperus and Other Poems, 1860; and the other containing subscriptions to The St.Lawrence and the Saguenay, 1856; with newspaper reviews of his work, 1856-1887, as well as manuscript versions of Hesperus and other poems and Passing Thoughts. Also included are autograph notes concerning himself and his family; a phrenological character of Sangster, 1859, and a typescript made at McGill of his poems.