Complex sentence: The classically-styled Arbigland House was built in 1755 by improving laird and gentleman architect William Craik (1703--98) and a small dower house called The House on the Shore was built in 1936 by Kathleen Blackett-Swiny.
Split into simpler sentences: The classically-styled Arbigland House was built in 1755 by the improving laird and gentleman architect William Craik (1703--98). A small dower house called The House on the Shore was built in 1936 by Kathleen Blackett-Swiny.