Rapid transit routes in the Annexed District, (the Bronx)from the Tribune, Dec 29, 1879. Colored routes actually granted were; Orange: West Side and Yonkers Railway, the New York City and Northern RR, the Yonkers Rapid Transit. Green: Harlem River and Portchester Rapid Transit. Purple: The Jerome Park Railway. Blue: Suburban Rapid Transit (3rd Ave El)

August Belmont Jr, (Feb 18, 1853 – Dec 10, 1924) founded the Interborough Rapid Transit Company in 1902 to help finance the construction of and operate New York City's first underground rapid transit line. He served as president and chairman of the IRT. His father, August Belmont, Sr. (Dec 8, 1813 – Nov 24, 1890) was an owner and Director of the Jerome Park Racetrack.

1893 map of Ward 24 Plate 36 showing the Norwood section of the Bronx and the Jerome Park RR from the junction with the New York and Harlem River RR to the Jerome Park racetrack

Jerome Park RR 1893 map showing the West end of the RR Spur at Jerome Park.

Jerome Park RR 1893 map showing the RR ROW traversing Mosholu Parkway. Public School #8, East of Briggs Ave, was one of the earliest public structures in the area. The school overlooked the RR ROW.

Inset of 1883 map showing the RR ROW traversing the streets North of the parkway; Bainbridge, Perry, Hull, Decatur / Norwood and Webster Avenues.

Inset of 1893 map showing the junction with the NY & Harlem River RR

A construction photo of the Jerome Park Reservoir from of a period magazine article.

1924 Areria view East of the parkway showing the 52ndPrecinct on Webster Ave and path of the former Jerome Park RR Row from Decatur Ave across Hull and acoss the parkway at Perry and Bainbrdge Avenues

This freight siding in in back of the 52nd Precinct on Webster Ave was the last remnant of the Jerome Park RR and remained active until the siding was removed in the 1970's. The junction and ROW curved to the West, as indicated by the shape of the building on the left. The 3rd Ave El structure over Webster Ave is in the distance as seen from the second Mosholu Parkway bridge was built to replace the original, but never put in use.