▁the ▁second ▁survey ▁voyage ▁of ▁HMS ▁Be agle , ▁and ▁had ▁written ▁to ▁H ens low ▁propos ing ▁Leonard ▁Jen yn s ▁as ▁" a ▁proper ▁person ▁to ▁go ▁out ▁as ▁a ▁natural ist ▁with ▁this ▁expedition ", ▁or ▁if ▁he ▁was ▁un available ▁seeking ▁recommend ations ▁for ▁an ▁alternative ▁to ▁take ▁up ▁this ▁" gl orious ▁opportunity ". ▁When ▁Jen yn s ▁decided ▁not ▁to ▁leave ▁his ▁parish , ▁he ▁and ▁H ens low ▁thought ▁of ▁Dar win . ▁H ens low ' s ▁letter , ▁read ▁by ▁Pe ac ock ▁and ▁forward ed ▁to ▁Dar win , ▁expected ▁him ▁to ▁eager ly ▁catch ▁at ▁the ▁likely ▁offer ▁of ▁a ▁two - year ▁trip ▁to ▁Terra ▁del ▁Fu ego ▁& ▁home ▁by ▁the ▁East ▁Ind ies , ▁not ▁as ▁" a ▁finished ▁Natural ist ", ▁but ▁as ▁a ▁gentleman '' ▁" amp ly ▁qualified ▁for ▁collect ing , ▁obser ving , ▁& ▁not ing ▁any ▁thing ▁worthy ▁to ▁be ▁noted ▁in ▁Natural ▁History ". ▁The ▁appointment ▁was ▁more ▁as ▁a ▁companion ▁to ▁Captain ▁Robert ▁Fitz Ro y , ▁than ▁as ▁a ▁mere ▁collect or . ▁H ens low ▁wrote ▁" I ▁ass ure ▁you ▁I ▁think ▁you ▁are ▁the ▁very ▁man ▁they ▁are ▁in ▁search ▁of ". ▁ ▁His ▁father ▁thought ▁the ▁voyage ▁a ▁waste ▁of ▁his ▁son ' s ▁time ▁and ▁strongly ▁object ed . ▁De ject ed , ▁Charles ▁decl ined ▁the ▁offer , ▁and ▁went ▁to ▁Ma er ▁for ▁the ▁part ridge ▁shooting ▁with ▁a ▁note ▁from ▁his ▁father