What you want to see in this map is the line at the right which -when you enlarge the image- is labeled Spuyten Duyvil Creek. The first curve in the S is now the tidal basin in Inwood Hill Park. The creek then winds around Marble Hill, joining the Harlem River. To the left of Marble Hill is a thin line. That creek was dredged and the hillside blasted to form the Ship Canal, enabling freight to move via barge from the Hudson to the Sound (East) River.
