22。ItwouldbeinterestingtocomparethispartofMillwiththecorrespondingpartofHume’sTreatise。Hume，likeMill，beginsbyacceptingcausationasoneoftherelationsinvolved，andthenexplainsitasmerelyderivative。Histreatmentofrelationsgenerally，especiallythedivisionofrelationsintothetwoclasses，whichdoordonotdependuponthe’ideas’themselves，hasabearinguponMill’sdoctrinetoointricatetobeconsideredhere。[TreatiseofHumanNature，pt。vi。sec。1。]IdonotthinkthatMillwasveryfamiliarwithHume’swritings。AnotetotheconcludingchapteroftheExaminationofHamiltonseemstoimplythathewasnotacquaintedwiththeTreatise；nordoesheappearfromhisposthumousEssaystohavestudiedHume’swritingsupontheology。WhetherT。H。GreenwasrightinholdingthatHumehadamoredistinctviewthanhissuccessorofsomemetaphysicaldifficulties，Ineednotinquire。
23。Logic，p。70bk。i，ch。v，section7。
24。Ibid。p。434bk。iv，ch。iii，section2n。。
25。Logic，p。132bk。ii。ch。v，section4。
26。EspeciallytheearlyreviewofWhately。