How many 1858 houses still exist in Colrain The 1858 map of Colrain is the oldest "complete" map-it shows every road and every house with its owners name. To answer "how many still exist"each 1858 house has been given a number (see above). A database list has been made. From his house numbers map I have made 17 "Maplets" of smaller areas to make research easier. (the full map is huge), (13 seen here , also 4 village maplets). A modern road map, with road names, helps with the 1858 map. Note that today's Franklin Lane did not exist in 1858. A 3rd map - 1990 USGS with house shown is useful (below) This 1990 USGS map is more accurate than the 1858 map. Since it shows all houses in 1990, it can be matched up with the 1858 map to pinpoint the old houses. For example, as you drive along a road, follow the 1990 houses (many will be newer) until you come to an old house. Then ...