{footnote]*’WanderingsinNewSouthWales’，vol。ii。chap。viii。，1834。
Dr。BurroughstatesofanotherGibbon，theHorlackorHooluk：\"Theywalkerect；andwhenplacedonthefloor，orinanopenfield，balancethemselvesveryprettily，byraisingtheirhandsovertheirheadandslightlybendingthearmatthewristandelbow，andthenruntolerablyfast，rockingfromsidetoside；and，ifurgedtogreaterspeed，theyletfalltheirhandstotheground，andassistthemselvesforward，ratherjumpingthanrunning，stillkeepingthebody，however，nearlyerect。\"
Somewhatdifferentevidence，however，isgivenbyDr。WinslowLewis：*
\"Theironlymannerofwalkingwasontheirposteriororinferiorextremities，theothersbeingraisedupwardstopreservetheirequilibrium，asrope-dancersareassistedbylongpolesatfairs。Theirprogressionwasnotbyplacingonefootbeforetheother，butbysimultaneouslyusingboth，asinjumping。\"Dr。SalomonMulleralsostatesthattheGibbonsprogressalongthegroundbyashortseriesoftotteringjumps，effectedonlybythehindlimbs，thebodybeingheldaltogetherupright。
[footnote]*’BostonJournalofNaturalHistory’，vol。i。，1834。