Complex sentence: It was built in the early 17th century as a timber-framed house by a member of the Egerton family but around 1870, when being used as a rectory, was encased in Ruabon red brick whilst the Rev Lionel Garnett was rector.
Split into simpler sentences: It was built in the early 17th century as a timber-framed house by a member of he Egerton family. During the 19th century it was used as a rectory, and in about 1870 it was encased in brick at the time that Rev Lionel Garnett was rector.