Citation - New York Mercury (Gaine): 1767.07.20

NYM(G.767.065
20 Jul 1767:32 (820)
The third night, at Mr. Burns's assembly room, to-morrow,
being Tuesday the 21st instant; Mr. Douglass will deliver a
lecture on heads. . . Between the parts, and at the end of
the lecture, singing by Mr. Woolls.  To begin at 7 o'clock.
  Tickets are sold at Hugh Gaine's store, in Hanover-Square,
and at Mr. Burns's, in the Broad-Way, at a dollar each. . .