Specification of David Evans
Subtitle: apparatus for sweeping and regulating draught in chimneys
Publisher: Great Seal Patent Office; George E. Eyre and William Spottiswoode)
Published: 1854
Place of publication: London
Language: eng
Subjects: Chimneys; Smoke prevention
Notes: Cover title.

At head of title: A.D. 1843. No.9921.

"David Evans, of Coleshill Street, Eaton Square, in the county of Middlesex, engineer".