Layer Estimates:

Layer: Historic_Hundreds_1stEdOS_(WGS84)_RCAHMW_ply (ID:0)
Count: 116
Extent:

XMin: 166704.150033818
YMin: 164137.183805042
XMax: 356925.16484729
YMax: 398453.148885936
Spatial Reference: 27700 (27700)

Layer: Historic_Hundreds_Merged_1stEdOS_(WGS84)_RCAHMW_ply (ID:1)
Count: 90
Extent:

XMin: 166704.150033818
YMin: 164137.183805042
XMax: 356925.16484729
YMax: 398453.148885936
Spatial Reference: 27700 (27700)