The immigrant who arrives too late in life to adapt to his new country, but too early to survive on nostalgia for the old country, has to create a third, imagined country to live in. When my grandmother got Alzheimer’s I was tempted to see it as an expression of her late-life immigration from the USSR to the USA, leaving one civilisation and never arriving at the other. (I was a teenager.) One of her daughters had cut off her past and been reborn as an American; the other returned over and over to Russia, making documentaries, unearthing graves and exploring gulags so she was all ‘memory’. But my grandmother had neither future nor past. As her illness got worse she would be found walking dazed along the boardwalk in Brighton Beach, the Russian ghetto where Brooklyn meets the ocean, a last stop on the subway from Manhattan. In the evening the boardwalk would be full of Russian immigrants with gaudy haircuts and fur-wrap finery, and as the light faded you could forget you were in America.