Robert D. Mulford, who served as organist and choir director of the East Hampton Methodist Church and the Springs Presbyterian Church for many years until his retirement in 2001, died of congestive heart failure on Sept. 22 at D’Youville Senior Care, the long-term nursing facility of the D’Youville Life and Wellness Community in Lowell, Mass. He was 89 and had been in declining health, his family said.