Foundation in southeast ... AMS 297 Horizontal (normal) ... 3 Jul 1931
Northeast corner ... AMS 297 Horizontal (normal) ... 3 Jul 1931
Northeast corner ... AMS 297 Horizontal (normal) ... 6 Jul 1931
AMS 298 Horizontal (normal) ... 3 Jul 1931
Rectangular foundation in southeast corner ... AMS 323 Horizontal (normal) ... 6 Jul 1931