Complex sentence: From about 1918-1922, Channon was at Christ Church, Oxford where he began a lifelong friendship with Prince Paul of Yugoslavia, whom in his diaries he often spoke of loving.
Split into simpler sentences: From about 1918 to about 1922, Channon was at Christ Church, Oxford. At Oxford, he began a lifelong friendship with Prince Paul of Yugoslavia whom in his diaries he often speaks of loving.