Complex sentence: He finds that his "home" is a boarding house, and in discussion with the strangers he meets there, he discovers that he has been transmitted back in time to April 14,1865, the day of Abraham Lincoln's assassination.
Split into simpler sentences: He finds that his "home" is a boarding house. In discussion with the strangers he meets there, he discovers that he has been transmitted back in time to April 14,1865, the day of Abraham Lincoln's assassination.