Complex sentence: In 1901, while in South Africa, Wallace married Ivy Maude Caldecott (1880?--1926), although her father, a Wesleyan missionary, Reverend William Shaw Caldecott, was strongly opposed to the marriage.
Split into simpler sentences: In 1901, while in South Africa, Wallace married Ivy Maude Caldecott (1880?--1926). Her father, a Wesleyan missionary, Reverend William Shaw Caldecott, was strongly opposed to the marriage.