▁ex - s ail or ▁with ▁a ▁wooden ▁left ▁leg ▁from ▁the ▁kne e ▁down . ▁His ▁head ▁is ▁almost ▁bald ▁and ▁what ▁little ▁hair ▁he ▁has ▁is ▁g ri zz led . ▁His ▁eyes ▁are ▁pale ▁blue ▁with ▁a ▁gentle ▁look ▁to ▁them , ▁and ▁his ▁face ▁is ▁round , ▁rug ged , ▁and ▁bron zed . ▁He ▁has ▁been ▁T rot ' s ▁companion ▁from ▁birth ▁as ▁he ▁was ▁her ▁mother ' s ▁star ▁board er . ▁Form er ly ▁he ▁was ▁captain ▁of ▁a ▁sch oon er ▁with ▁T rot ' s ▁father ▁was ▁his ▁mate ; ▁after ▁losing ▁his ▁leg , ▁the ▁Cap ' n ▁retired , ▁and ▁T rot ' s ▁father ▁was ▁promoted ▁to ▁captain ▁of ▁the ▁same ▁ship . ▁ ▁Cap ' n ▁Bill ▁and ▁T rot ▁also ▁play ▁significant ▁roles ▁in ▁the ▁later ▁O z ▁books ▁The ▁Lost ▁Princess ▁of ▁O z ▁( 1 9 1 7 ), ▁The ▁Magic ▁of ▁O z ▁( 1 9 1 9 ) ▁and ▁The ▁Mag ical ▁M im ics ▁in ▁O z ▁( 1 9 4 6 ). ▁Ba um ▁borrow ed ▁from ▁one ▁of ▁his ▁own ▁earlier ▁characters , ▁N ab oth ▁Per kins ▁in ▁Sam ▁Ste ele ' s ▁Advent ures ▁on ▁Land ▁and ▁Sea ▁( 1 9 0 6 ), ▁to ▁create ▁Cap ' n ▁Bill . ▁ ▁Cap ' n ▁Bill ▁appears ▁in ▁Return ▁to ▁O z , ▁in ▁the ▁background ▁at ▁Princess ▁O z ma ' s ▁coron ation , ▁holding ▁the ▁Magic