He travelled extensively throughout mainland Europe and produced his first significant collection of etchings , several of which were shown in London at the Royal Academy 's Summer Exhibitions ( 1929 -- 1933 ) .
Lumsden 's book ' The Art of Etching ' ( 1925 ) .
Lumsden travelled extensively throughout mainland Europe and produced Lumsden 's first significant collection of etchings , several of which were shown in London at the Royal Academy 's Summer Exhibitions ( 1929 -- 1933 ) .
Lumsden 's book ' The Art of Etching ' ( 1925 ) .