Medieval church plan and piscinae

The drawing shows: Fig. 1: plan of a church, Fig. 2: a single stoup set in a wall at Chalk, Kent, Fig. 3: a broken stoup supported by a carved figure in Milton, Kent, Fig. 4: a piscina with two basins in a double-arched nich with a shelf at Cooling, Kent, Fig 5: a representation of the Trinity.