Complex sentence: After retirement in 1900, until his death, Charles Dellshau illustrated 13 known notebooks with colored drawings of airships, while he lived in an attic in Houston, Texas.
Split into simpler sentences: After retirement in 1900, Charles Dellshau illustrated 13 known notebooks with colored drawings of airships. Charles A. A. Dellschau produced a body of work from the turn of the past century until his death, while he lived in an attic in Houston, Texas.