Complex sentence: Bucknell married Harriet Burr Ashton in 1836, Margaret Knowles Crozer in 1839 and after her death in 1870, Emma Eliza Ward, who was a survivor of the "Titanic".
Split into simpler sentences: Bucknell married Harriet Burr Ashton in 1836, Margaret Knowles Crozer in 1839 and Emma Eliza Ward in 1870. Ward was a survivor of the "Titanic".