Complex sentence: While establishing himself as a lawyer in his father's practice, Hopkins married Hester Davis in 1891, with whom he had two children, Sherburne Philbrick on December 3,1891, and Marjorie on August 5,1894.
Split into simpler sentences: While establishing himself as a lawyer in his father's practice, Hopkins married Hester Davis in 1891. Sherburne and Hester had two children, Sherburne Philbrick on December 3,1891, and Marjorie on August 5,1894.