A newly released trove of letters from Albert Einstein sheds light on the personal and professional travails of the physicist in 1915, when at the same time his marriage was disintegrating he was devising his general theory of relativity, according to a feature article in today’s Los Angeles Times. The letters, which appear in Volume 10 of The Collected Papers of Albert Einstein, a publishing project of the California Institute of Technology and Princeton University Press, were only just disclosed because of the terms of the will of Einstein’s stepdaughter Margot. She donated the letters on condition that they not be released until 20 years after her death; she died in 1986.