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....
Printed list of corrections to the list of special days. Dated May 11, 1909, the list includes special events in June through September that have been changed since the "program of special days" was released.
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.