The year 1840 was the beginning of Crown land auctions of land to the east of Melbourne and south of the Yarra River and Gardiners Creek. The high ground between Gardiner's Creek Road (now Toorak Road) and the river returned the best prices and it was here that most of the grand mansions of the period were built. Much of the land south of Toorak Road was swampy. This area was subdivided into much smaller blocks, for workman's cottages and later to house gold-rush immigrants. The distinction between the two areas remains today in the suburbs of Toorak and South Yarra. Further auctions of land in the Prahran area took place in 1849 and 1850.