Atlas of the borough of the Bronx, city of New York : based upon official plans and maps on file in the various city offices; 1901.
(Source: Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "Double Page Plate No. 19, Part of Ward 24, Section 11. [Bounded by Webster Avenue, E. 184th Street, Belmont Place, Quarry Road, Lafontaine Avenue and E. 179th Street.]" The New York Public Library Digital Collections. 1901.)
The best sources for viewing old maps of the Bronx (specifically in the Morris Park and Belmont neighborhoods) are those produced by local, state, and federal government; fire insurance companies; and tk. Below are some resources that may be useful in researching this area.