April 19, 1865 funeral procession

[L Verge]

Is there written in the right upper corner “8th May”?

Who has the answers?

I think that notation in the right upper corner is "No. 748" in reverse...

I don't know why, but I always thought the period of mourning for high officials was set individually by the President or Congress???

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I cannot verify that this was the case at the time of Lincoln's death, but from what I can find out, the sitting President (Andrew Johnson?) would proclaim a 30-day period of official mourning beginning on the day after the death (April 16?). This appears to be the practice to this day.

Found some trivia along the way:

What was the name of the locomotive that pulled Lincoln's funeral cars out of D.C.?

Who was given the first non-presidential state funeral? In what year?