Citation - Pennsylvania Journal: 1779.11.10

PJ.779.061
10 Nov 1779:13 (1313) 
To the public.  The subscriber has opened a school at the
long-room, in Carter's Alley, for the tuition of young
ladies and gentlemen in the polite art of dancing.--Those
who are pleased to employ him, may depend on having their
children taught in the most approved method, and the utmost
attention paid to their manners and decorum, by their most
obedient servant, [signed] Wm. M'Dougall.
N.B. An evening school is opened for grown gentlemen.