Marsh built the tower so that he could see the approach of strangers from a great distance .
The new Gothic Revival style house was three stories high and had an observation tower that rose 65 feet ( 20 m ) into the air .
Marsh built the tower so that he could see the approach of strangers from a great distance .
The new Gothic Revival style house was three stories high and had an observation tower that rose 65 feet ( 20 m ) into the air .