At the bottom left of the photo is what appears to be a horse-drawn streetcar. If it was electric, there would be a slot between the tracks for conduit operation. The last horsecar line on the Bleecker Street route in Manhattan lasted until 1917, while Pittsburgh had this form of transit on Sarah Street until 1923. You can still ride horsecars at Disneyland. There is a wild horsecar chase through Manhattan in this 1928 Harold Lloyd movie.

The two Detroit Photographic Company images do form an almost perfect panorama, with a few small details glitched slightly by crowd movements, and by the wind (the US flag at top left is visible in the above image but slack against its pole in the adjacent exposure). Here is a micro-mini version achieved in Photoshop, sized for this format.

This view is harder to pin down because almost every building is now park of Seward Park or the Seward Park Houses.

The street at the far left is Norfolk Street, heading North. It no longer exists below Grand Street. The cross street in the upper center frame is Hester.

The funeral is walking north on Jefferson Street and turning right (east) on Division.

This helps: https://www.loc.gov/resource/g3804nm.g3804nm_g06116190501/?sp=26

... or at least a goodly potion of the Lower East Side: it's quite a bit bigger now, but nothing remains from this picture (except a tree, maybe).

Named for the New York statesman famous for orchestrating the purchase of Alaska in 1867.

... would that be a funeral procession?