Evidence for Date of Latest Course of Great Drain; West Branch. Coins from Gravel Filling of "Middle Drain" ... Ζ-14 2672, 2673 Ζ:1937.0602:1 N 19481 Ζ:1937.0604:1 N 19484 Ζ:1937.0604:2 N 19488 Ζ:1937.0604:3 N 19489 Ζ:1937.0604:4 N 19490 Ζ:1937.0604:5 N 19485 Ζ:1937.0604:6 Ζ:1937.0604:7 Ζ:1937.0604:8 N 19486 Ζ:1937.0604:9 ...