John Weeks Moore, Complete Encyclopaedia of Music… (1880)
“ Birchensha, John, (Birchenshaw) a Welshman, lived in family of Earl of Kildare in his youth, and afterwards taught the viol in London, one of his pupils being Samuel Pepys. He published a prospectus, in 1672, of a complete system of music, intended to be published by him under the title of "Syntagma Musicae." ”
