Some absolutely stunning drawing here, I've always liked Orpen's work, he has an beautiful use of line, I think I need to take some more lessons! Search Results for "orpen" - VADS: the online resource for visual arts The economy of line and yet the solidity, fantastic! I've always admired Eric Kennington's drawings now I realise that essentially they had the same drawing technique.
Had a quick shufti on IWM site. 145 examples of Orpen's work there. http://www.iwmcollections.org.uk/qryMain.php search for Orpen in art section