▁upper ▁Nu uan u ▁Valley ▁of ▁Hon ol ulu , ▁Hawai i . ▁ ▁History ▁The ▁house ▁was ▁built ▁in ▁ 1 9 0 3 ▁by ▁George ▁Rod iek ▁of ▁H ack field ▁and ▁Company , ▁a ▁natural ised ▁German ▁imm igr ant . ▁Origin ally ▁the ▁estate ▁compr ised ▁a ▁two - story ▁home ▁with ▁a ▁series ▁of ▁gard ens ▁featuring ▁f ern s , ▁rocks ▁and ▁orch ards , ▁sometimes ▁called ▁the ▁oldest ▁formal ▁Japanese ▁garden ▁in ▁Hon ol ulu . ▁ ▁Rod iek ▁served ▁as ▁German ▁cons ul ▁as ▁well ▁as ▁president ▁of ▁the ▁Hawai ian ▁Sug ar ▁Plan ters ' ▁Association . ▁In ▁ 1 9 1 7 , ▁he ▁was ▁accused ▁of ▁invol vement ▁in ▁the ▁H indu ▁German ▁Cons pi racy ▁to ▁f oment ▁revolution ▁in ▁India . ▁Though ▁subsequently ▁given ▁a ▁president ial ▁p ardon , ▁he ▁sold ▁the ▁house ▁to ▁Alan ▁Wil co x ▁in ▁ 1 9 1 8 ▁and ▁moved ▁with ▁his ▁family ▁to ▁San ▁Francisco , ▁never ▁to ▁return . ▁In ▁the ▁ 1 9 3 0 s ▁the ▁house ▁was ▁purchased ▁by ▁Mr . ▁& ▁Mrs . ▁H . ▁Alexander ▁Walker . ▁Mr . ▁Walker ▁was ▁president ▁of ▁American ▁Fact ors , ▁the ▁successor ▁firm ▁to ▁H ack feld ▁and ▁Company , ▁and ▁Hawai ian ▁Sug ar ▁Plan ters ▁Association . ▁Mr . ▁Walker , ▁whose ▁father ▁J . S . ▁Walker ▁was ▁a ▁member ▁of ▁King ▁Kal ak au a ' s ▁cabinet , ▁dub bed ▁the ▁gra cious ▁estate