the other major effect of industrialisation was the vast expansion in housing stock. titus salt's saltaire is an example of a model village, and hargreaves had cottages built for his workers around the town centre and his mill. he built 92 back-to-back houses along market street and central avenue in an area which came to be called "hargreaves square" or "the square". the houses were built by filling in the old courtyards. the population of the township grew from 1,214 in 1822 to just over 3,000 in 1851 to 10,000 by 1869.