[tsm]

&c was widely (exclusively?) used in the 18th century. I happen to have been looking at this newspaper ad most recently: https://i.imgur.com/ALe5XeT.jpg

The inference is that the second book (Airs &c &c) will also be of Airs, Minuets, Gavotts, and Reels (or something similar).

Also, 18th-century letters routinely end with some snowclone of "your most humble and obedient servant", with many writers eliding some or all of it with &c since it was understood.

[i_am_proteus]

Plus, during the lead type era, using the '&' instead of 'et' saved the printer wear on often-heavily-worn 'e's and 't's in the font.