From the passage provided, extract the types of castles in Greater Manchester and the corresponding number of each type in a numbered list of format {Type} - {Number}

There are nine castles in Greater Manchester, a metropolitan county in North West England. They consist of four motte-and-bailey castles, three fortified manor houses, an enclosure castle, and a possible shell keep. Four of Greater Manchester's castles are scheduled monuments: Buckton, Bury, Radcliffe Tower (pictured), and Watch Hill. The purpose of a castle was not simply militaristic, but was also considered to be a stamp of authority over the population of an area and a status symbol. Some would have acted as centres of trade and administration for a manor. The earliest castles in Greater Manchester are Dunham and Watch Hill in Trafford, Ullerwood in Manchester, and Stockport Castle in Stockport. They were first recorded in 1173 as belonging to barons who had rebelled against Henry II.

1. Motte-and-bailey castle - 4
2. Fortified manor house - 3
3. Enclosure castle - 1
4. Shell keep - 1