▁In ▁contrast ▁to ▁most ▁ill ust rat ors ▁who ▁worked ▁in ▁pen ▁& ▁in k , ▁Coll ▁achieved ▁true ▁t onal ▁grad ations ▁in ▁his ▁illustr ations ▁by ▁using ▁pen ▁stro kes ▁to ▁build ▁up ▁a ▁complete ▁range ▁of ▁values . ▁He ▁was ▁influenced ▁by ▁the ▁Spanish ▁pen ▁& ▁in k ▁artist ▁Daniel ▁Vier ge . ▁According ▁to ▁illustr ation ▁exper ts , ▁Coll ' s ▁other ▁great ▁qual ities ▁were ▁his ▁v ivid ▁imagination ▁and ▁the ▁unique ▁pers pect ives ▁that ▁he ▁used ▁in ▁his ▁works . ▁ ▁Coll ▁was ▁also ▁a ▁painter ▁and ▁he ▁often ▁did ▁paint ings ▁for ▁the ▁cover ▁or ▁front isp ie ce ▁of ▁books ▁which ▁were ▁reprodu ced ▁in ▁color ▁and ▁then ▁pen ▁& ▁in ks ▁to ▁illustrate ▁the ▁text . ▁He ▁was ▁considered ▁to ▁be ▁an ▁ideal ▁illustr ator ▁for ▁authors ▁such ▁as ▁Arthur ▁Con an ▁Do yle ▁and ▁other ▁advent ure ▁writers . ▁His ▁illustr ations ▁for ▁books ▁such ▁as ▁Tal bot ▁M und y ' s ▁King ▁of ▁the ▁K hy ber ▁R if les ▁and ▁Sax ▁R oh mer ' s ▁The ▁Ins id ious ▁Dr . ▁Fu ▁Man ch u ▁were ▁widely ▁repr int ed ▁for ▁many ▁years . ▁Coll ▁died ▁in ▁ 1 9 2 1 ▁of ▁append ic itis , ▁aged ▁ 4 0 . ▁ ▁Notes ▁ ▁References ▁W alt ▁Re ed , ▁America ' s ▁Great ▁Ill ust rat ors , ▁Ab be ville ▁Press , ▁ 1 9 7 9 , ▁p .   3 6 ▁John