Charlie (as he asked Jill to call him) spoke with a slight lisp and was an extraordinarily talented, nice human being. He illustrated the first three covers of The Mad Scientists’ Club books and The Marvelous Inventions of Alvin Fernald in the 1960s. He also illustrated the interiors with the exception of The Big Kerplop. Coming out of retirement in his mid-80s, from 2003 to 2004 he illustrated the the interior of The Big Kerplop, including a drawing of a dump-truck load of watermelons landing on the Colonel’s car (at Jill’s request), completely illustrated The Big Chunk of Ice and did a new full-color cover of The Marvelous Inventions of Alvin Fernald. He was a treasure to work and we’re in his debt for the legacy of work he left to the Mad Scientists series. He sent Jill his self-portrait in this 2005 greeting card. We imagine this is how Henry Mulligan would look if literary characters aged!