Citation - Boston Evening Post (Fleet): 1769.04.03

BEP(F.769.021
3 Apr 1769:31 (1749) 
For the benefit of Mr. Hartley, a grand concert of vocal and
instrumental music, at Concert-Hall. To be performed on the
14th instant. The vocal part by a gentleman from London.
Tickets to be had of the printers; Mr. Jackson, at the
Brazen-Head; the London Book-Store; and at Mr. Hartley's
lodgings at Mrs Blagdon's, near the Town House, at half a
dollar each. To begin at 6 o'clock, p.m.