"Piercy Roberts was an engraver and publisher whose career in the London publishing trade spanned a period of approximately thirty years from 1795 until the late 1820s. Readers of this blog will undoubtedly associate him with the slew of idiosyncratic caricatures he published between 1801 until 1806, however this period accounts for a relatively small proportion of his career as an engraver of prints."
From, "A Biographical Sketch of Piercy Roberts (1174 - 1863)" in The Printshop Window-Caricature & Graphic Satire in the Long Eighteenth Century.
For more sources on Roberts, go HERE.
