An essay upon harmony
Subtitle: as it relates chiefly to situation and building.
Contributors: Morris, Robert, 1701-1754.
Publisher: Printed for T.Cooper
Published: 1739
Place of publication: London
Language: eng
Number of pages: 38
Notes: Authorship also attributed to Robert Morris, cf. NUC.

Gwynn's first work, cf. Colvin's Biographical Dictionary of English Architects, 1660-1840.