Hi Listers, Is anyone familiar with reading the city maps of c.1850? I'm looking at a map of part of the industrial housing area of Bolton at this time, and note two lines of fine dots running, usually, down the centre or side of streets. One line has a round spots with 'Pump' marked against them, another line has small squares with 'Grate' marked against them. Am I right in assuming that the line with 'Pump' indicates a 'fresh' water course, while the line with 'Grate' indicates an effluent drain? Also would the small squares attached to the outer wall of many houses be the 'privy'? All suggestions gratefully received. cheers, Cassie