Another of my dad’s friends and colleagues was one Peter Gay, who was an immigrant whose family fled to the US during WWII, carrying all their wealth in the form of rare postage stamps, pasted to a postcard collection that Peter carried. They boarded the ill-fated St. Louis, a refugee-ship that cruised up and down the US East Coast being denied landing rights because the US didn’t want any jewish refugees.[wik] The family managed to sneak off the boat in Cuba and later got a ride to the US. He was a stamp collector until his death in 2015. He was a great expert on Voltaire, and wrote a seminal text Voltaire’s Politics, the Poet as Realist [amzn].