Over the course of 17 years, Susan Lynn Solomon of Amagansett and New York City, a founder and longtime chief executive officer of the New York Stem Cell Foundation, raised more than $400 million to advance the field of stem cell research. Ms. Solomon, who had had only recently stepped down as the organization’s C.E.O., died last Thursday, at home in Amagansett, five years after she was diagnosed with ovarian cancer. She was 71.

Lucas Conrad Matthiessen, 69, an editor and writer who also ran a network of clinics for drug and alcohol abusers, died on Aug. 20 at a hospice near his home on City Island in the Bronx. The cause of death was metastatic cancer, said his wife, Claire de Brunner.