Lives: The Cartographer Who Mapped Wells Until There Were None Left to Map

She began as a hydrologist plotting aquifers no one thought would ever run dry, and she ended, at eighty-eight, as the keeper of an archive of vanished water. Constance Bello mapped the wells, springs and seasonal rivers of West Africa for four decades, and for most of them her work was infrastructure — dull, essential, consulted by engineers. Somewhere in the last twenty years it became memory. The wells she had charted began to fail faster than she could update the record, and she made a deliberate choice her colleagues found strange: she kept the dry ones on the map, marked with a small closed circle, so that no one could pretend they had never held water. "A map that forgets is a lie," she told a young surveyor who wanted to delete the empty points. Her atlases now guide the relief corridors she never lived to see fill — the Passage Trust routes trace, in part, the water she recorded before it left. She died last month, her final map unfinished, the closed circles outnumbering the open ones for the first time.