Complex sentence: Among the earliest commissions was one for architect Michael Searles to design a 14-house crescent,'The Paragon', on the south side of the Heath--some of the colonnades are said to incorporate pillars used in Page's mansion.
Split into simpler sentences: Among the earliest commissions was one for architect Michael Searles to design a 14-house crescent, "The Paragon", on the south side of the Heath. Some of its colonnades are said to incorporate pillars used in Page's mansion.