LAKEPORT, Calif. — We are sad to announce the death of Robert Francis Derenthal at the age of 88.

Bob was the loving husband of Catherine Ryan — married to her for 49 years, including 23 years of happy retirement in Lakeport.

Bob’s career mirrored his intelligence and curiosity. He was a radio DJ, experimental psychologist and hospital executive. At home, he maintained his own 8,000-book library.

Bob was predeceased by his son, Daniel and survived by son, Thomas; daughter, Susan Lockhart; his former wife, Andree Carlson; and four grandchildren.

A service will be conducted later in Collegeville, Minnesota.

Arrangements by Chapel of the Lakes Mortuary 707-263-0357 or 994-5611 or visit www.chapelofthelakes.com.