Proposals, / [electronic resource] by Messrs. V. and R. Green, of ... London; and Chr. de Mechel, of Basil, in Switzerland; for publishing by subscription, a print, ... to be engraved in the line manner, ... from a picture now painting by P. J. de Loutherbourg, ... representing the grand attack on Valenciennes, by the combined armies, under the command of His Royal Highness the Duke of York, July the 25th, 1793