Kerfoot's first Diocesan Convention assembled in Pittsburgh on May 16, 1866, but he was unable to participate in it fully. On the opening day, he met with Diocesan Board of Missions in Trinity Church from 10.30 a. m. to 1.30 p. m. and again from 3:00 p. m. to 4.30 p. m. At 5:00 p. m., he opened the Diocesan Convention with prayers, and presided till adjournment at 6.30 p. m. At 8:00 p. m., he presided at a Diocesan Missionary Meeting at St. Andrew's Church till 10:00 p. m. After that he said that he was "very weary, exhausted and sick."