Shotgun shacks were small roadside houses common in the Mississippi Delta near agricultural fields, usually built with three to five rooms and no hallway, so that doors opened from one room directly into the next. From 1865 until the 1960s, many sharecroppers in the Delta lived in these homes supplied by plantation owners, farming on shares and settling accounts at the end of the season, though after expenses were deducted families received little profit. Conditions were harsh in the single-wall houses, which had no insulation, were freezing in winter and blazing hot in summer, and sometimes used newspaper pages as wallpaper pasted up with flour glue. In the 1930s, as workers moved north for better-paying jobs, plantation owners turned to faster and cheaper cotton harvesting methods, and the Rust mechanical cotton picker, introduced in 1935, could gather in an hour what four workers needed a day to pick. Few shotgun shacks remain today, though they were once a familiar Southern form of housing, and many Southerners were born in them, including McKinley Morganfield, known as Muddy Waters, who lived in one until he was three.