▁and ▁made ▁extensive ▁use ▁of ▁the ▁library . ▁Dar win ' s ▁reading ▁included ▁nov els ▁and ▁Bos well ' s ▁Life ▁of ▁Johnson . ▁He ▁had ▁brought ▁natural ▁history ▁books ▁with ▁him , ▁including ▁a ▁copy ▁of ▁A ▁Natural ist ' s ▁Comp an ion ▁by ▁George ▁Gra ves , ▁bought ▁in ▁August ▁in ▁anticip ation ▁of ▁seeing ▁the ▁se as ide , ▁and ▁he ▁borrow ed ▁similar ▁books ▁from ▁the ▁library . ▁The ▁brothers ▁went ▁for ▁regular ▁Sunday ▁wal ks ▁on ▁the ▁sh ores ▁of ▁the ▁F irth ▁of ▁For th ▁and ▁Dar win ▁kept ▁a ▁di ary ▁recording ▁their ▁finds , ▁which ▁included ▁a ▁sea ▁mouse ▁and ▁a ▁c utt le fish . ▁ ▁Dar win ▁wrote ▁home ▁that ▁" I ▁am ▁going ▁to ▁learn ▁to ▁stuff ▁birds , ▁from ▁a ▁black amo or ... ▁he ▁only ▁charges ▁one ▁gu inea , ▁for ▁an ▁hour ▁every ▁day ▁for ▁two ▁months ". ▁These ▁less ons ▁in ▁tax id erm y ▁were ▁with ▁the ▁fre ed ▁black ▁slave ▁John ▁Ed mon stone , ▁who ▁also ▁lived ▁in ▁L oth ian ▁Street . ▁Dar win ▁often ▁sat ▁with ▁him ▁to ▁hear ▁tales ▁of ▁the ▁South ▁American ▁rain - for est ▁of ▁Guy ana , ▁and ▁later ▁remembered ▁him ▁as ▁" a ▁very ▁pleasant ▁and ▁intellig ent ▁man ." ▁ ▁During ▁his ▁summer ▁hol iday ▁Charles ▁read ▁Zo ön om ia ▁by ▁his ▁grand father ▁Er as mus ▁Dar win , ▁which ▁his ▁father ▁val ued ▁for ▁medical ▁guidance ▁but ▁which ▁also ▁proposed ▁evolution