WEST TISBURY — The mysterious package arrived on a blustery day in February from a man Cynthia Riggs had not seen in 62 years. He wrote his return address in latitude and longitude. The contents baffled her: pages of yellowed paper towels, covered in penciled code.
Then, she remembered. In 1950, when she was an 18-year-old college student, she had landed a summer job sorting plankton at a marine geology lab in California. She befriended one of her colleagues, Howard Attebery, a kind soul who stood out from the other young men more interested in teasing her or nailing shut her lab drawers.