WALSH, JOHN (FIRM).
Publications issued before 1730, by John Walsh the Elder (1665
or 6-1736), are indicated by the letter "E"; publications by John
Walsh the Younger (1709-1766) issued after 1736, are indicated by
"Y"; publications issued between approximately 1730 and 1736, in
which both men apparently shared responsibility (see
Smith-Humphries, p. viii), are indicated by "B".