Citation - Boston Evening Post (Fleet): 1740.02.25

BEP(F.740.011
25 Feb 1740:22 (238)
Just published, and sold by Samuel Gerrish, The Grounds and
Rules of Musick, Explained:  Or, an Introduction to the Art
of Singing by Note.  Fitted to the meanest capacities.  By
the late Rev. Mr. Walter.  Recommended by several ministers. 
The third edition:   With a curious set of psalm tunes (in
number thirty eight) in three parts, from copper plates,
engraven with the greatest exactness and care.