No. LXVIII. GUIDE TO KNOWLEDGE. PRICE ONE PENNY.
Plan of OPORTO & Environs.
Published for the Proprietors, by W.Edwards, 13 Ave-Maria-lane, Aug.3, 1833.
(Sideways in margin): London - Printed by R.Clay, Bread-street hill, Cheapside.
Engraved on a woodblock by Joshua Archer for publication in the The Guide To Knowledge Edited By W. Pinnock. The woodblock was inked with a roller without working the ink into the engraved cuts thereby, the printed result is of white lines on a black ground. The Guide to Knowledge was a magazine issued in weekly parts from 1832.