▁Up state ▁Medical ▁Center . ▁The ▁Elizabeth ▁Black well ▁painting ▁was ▁used ▁as ▁source ▁material ▁for ▁a ▁US PS ▁$. 1 8 ▁post age ▁stamp . ▁However , ▁credit ▁was ▁not ▁extended ▁by ▁the ▁US PS ▁for ▁some ▁time ▁after ▁the ▁issu ance ▁of ▁the ▁stamp . ▁After ▁a ▁full ▁investigation ▁determined ▁that ▁K oz low ski ' s ▁painting ▁was , ▁in ▁fact , ▁the ▁original ▁source ▁for ▁the ▁stamp ▁design ▁the ▁US PS ▁tight ened ▁its ▁rules ▁regarding ▁the ▁documentation ▁of ▁source ▁materials ▁in ▁order ▁for ▁design ▁accept ance ▁and ▁acknowled ged ▁the ▁role ▁of ▁the ▁painting ▁in ▁the ▁design ▁process . ▁ ▁Land s cape ▁and ▁still ▁life ▁Char acters ▁in ▁a ▁Bar - room ; ▁O il ▁on ▁canvas ▁( 1 9 3 6 ) ▁( Private ▁collection ▁/ ▁Australia ) ▁Night ▁Sky line , ▁Chicago ; ▁O il ▁on ▁m ason ite , ▁( ~ 1 9 3 8 - 3 9 ) ▁( Private ▁collection ) ▁ ▁Tul um ; ▁O il ▁on ▁canvas , ▁( 1 9 4 0 ) ▁( Private ▁collection ) ▁Temple ▁of ▁the ▁D war f , ▁U x mal ; ▁O il ▁on ▁canvas , ▁( 1 9 4 0 ) ▁( Private ▁collection ) ▁C oh oct an ▁Valley ; ▁Water color ▁( ~ 1 9 4 8 ) ▁( Private ▁collection ) ▁Farm ers ▁B ount y ; ▁O il ▁on ▁canvas ▁( 1 9 4 9 ) ▁( Private ▁collection ) ▁Er ie ▁Canal ▁Aqu ed uct ;