BTW I somehow doubt the attribution of "Merrily we roll along" to "Good Night Ladies" as given in:
http://www.mudcat.org/thread.cfm?threadid=47180

I have been unable to check this, though, because I could not find any original of the 1847 E.P. Christy "Good Night Lady?/Ladies?" in Levy or in American Memory at Duke.

My best guess is that the confusion of the two songs dates to the 1915 Chas. K. Harris medley "Pickin' On de Ole Banjo" which uses "Merrily" as a patter sung behind "Ladies."

Bpb