▁Henry ▁and ▁his ▁wife ▁shared ▁extensive ▁Dutch ▁roots ▁in ▁British ▁North ▁America , ▁including ▁the ▁Sch uy ler ▁family ▁and ▁Van ▁Cort land t ▁family , ▁among ▁others . ▁Through ▁his ▁wife , ▁G age ▁inherited ▁a ▁large ▁part ▁of ▁the ▁American ▁estate ▁of ▁Vice - Ad mir al ▁Sir ▁Peter ▁Warren ▁( W ar ren ▁was ▁Sus anna ' s ▁grand father ). ▁The ▁historic ▁letters ▁and ▁documents ▁from ▁this ▁inheritance ▁were ▁later ▁don ated ▁to ▁the ▁Sus sex ▁Arch ae ological ▁Society ▁of ▁Lew es . ▁They ▁had ▁two ▁sons . ▁ ▁He ▁died ▁in ▁ 1 8 0 8 ▁and ▁was ▁succeeded ▁by ▁Henry ▁Hall ▁G age , ▁ 4 th ▁Vis count ▁G age . ▁ ▁See ▁also ▁▁ ▁Vis count ▁G age ▁ ▁References ▁ ▁Category : 1 7 6 1 ▁birth s ▁Category : 1 8 0 8 ▁death s ▁Category : Pe ople ▁educated ▁at ▁West min ster ▁School , ▁London ▁Category : B rit ish ▁Army ▁gener als ▁Category : Vis count s ▁in ▁the ▁Pe er age ▁of ▁Ireland ▁Category : M embers ▁of ▁the ▁Parliament ▁of ▁Great ▁Britain ▁for ▁English ▁constitu encies ▁Category : B rit ish ▁MP s ▁ 1 7 9 0 – 1 7 9 6 ▁Category : English ▁people ▁of ▁Dutch ▁descent ▁Category : G age ▁family ▁Category : Sch uy ler ▁family ▁Category : van ▁Cort land t ▁family <0x0A> </s> ▁The ▁Third ▁Tre aty ▁of ▁San ▁Il def onso ▁was ▁a ▁secret ▁agreement ▁signed ▁on ▁ 1