Citation - Rivington's New York Gazette: 1773.11.11

RNYG.773.070
11 Nov 1773:13 (30)
Frederick Heyer, Organ Builder, in the Broad-Way, in the
same house where Mr. George Cook, sadler, lives, near St.
Paul's Church.  Makes and repairs harpsichords and spinets
in the neatest manner, and with dispatch.  Has some new and
very neat harpsichords for sale.  Also a chamber organ,
which may, in a short time, be compleatly finished, and
enlarged (if tho't necessary) so as to suit a place of
public worship.