Citation - Boston Gazette: 1769.04.10

BG.769.015
10 Apr 1769:43 (732)
For the benefit of Mr. Hartley, a grand concert of vocal and
instrumental musick, at Concert-Hall; To be performed on the
28th instant.  The vocal part by a gentleman from London. 
Tickets to be had of the printers--Mr. Jackson's at the
Brazen-Head--The London Book-Store--And at Mr. Hartley's
lodgings at Mr. Blackden's, near the Town-House---at half a
dollar each.
  To begin at Six o'clock, P.M.