Mr. John D. Robertson, of Ellendale, Delaware, passed away on Saturday, May 21, 2011 at Milford Memorial Hospital in Milford, Delaware. He was 77 years old. Born in Philadelphia, Mr. Robertson was the loving husband of Fern P.(Revelle) Robertson and worked as a captain of a charter boat for many years. In addition to his wife, Mr. Robertson is survived by his brother Edward Sadoff. Services for Mr. Robertson will be private. Arrangements by The Oliver H. Bair Co. (215) 563-1580.