Re: Gonzalo Foseca's request for infos on the authorship of "Sketches  
on Political Economy" (1809):

In the Goldsmiths?-Kress library of economic literature, @ no. 19781,  
authorship is attributed to Granville Sharp, 1735-1813.

There is an entry on Sharp in the Dictionary of National Biography -- 
not mentioning, however, the Sketches on political economy (this does  
not mean much, as the Kress library lists some 50+ writings by him).

Daniele Besomi