Trivial Trivia - taking trivia to new levels

[RJNorton]

Yet another good guess, but still not correct.

Hint #2: Lincoln had exited the inaugural train, and he was in a procession riding in a barouche owned by a banker named Samuel Meeker. Hitched to the barouche were four gray horses. In all there were 20 carriages in the big parade.

The excited crowd began breaking through the police lines, and poor Mr. Winton ended up with a broken collarbone.