Complex sentence: Dr. Thomas Rooke, the husband of High Chiefess Grace Kamaikui, was the physician and being unable to determine the cause of the illness, he called upon Dr. Ruschenberger, a visiting surgeon, to assist him.
Split into simpler sentences: Dr. Thomas Rooke, the husband of High Chiefess Grace Kamaikui, was unable to determine the cause of the illness. He called upon Dr. Ruschenberger, a visiting surgeon, to assist him.