Complex sentence: Mawdley (Roy) Herapath Sambourne (1878-1946) did not marry, in 1898 his sister Maud Frances Sambourne (1875-1960) married Leonard Messel, a young stockbroker and collector.
Split into simpler sentences: Mawdley (Roy) Herapath Sambourne (1878-1946) did not marry. In 1898 his sister Maud Frances Sambourne (1875-1960) married Leonard Messel, a young stockbroker and collector.