Hand-typed letter dated 24 December 1957 from librarian Beatrice Hager of the Municipal Reference Library to Mr. H. E. Hibler of Cambridge, Massachusetts answering a series of questions posed by Mr. Hibler to the library regarding the A.Y.P.E....
Letter to John W. Vaux, a potential investor, from the A.Y.P.E. Finance Committee expressing the need for additional funds to complete the A.Y.P.E. and offering subscription for gold bonds. Dated 30 September 1908.