Shear's house in the center in Θ (lot 631/20) southeast Horizontal (normal) ... Summer 1936
northwest Horizontal (normal) ... 1936
west Horizontal (normal) ... June 1938
east Horizontal (normal) ... 15 May 1935
southeast Horizontal (normal) ... June 1939
west 1597 ... 16 Jun 1967
west 1595 ... 16 Jun 1967
AMS east Horizontal (normal) ... 12 May 1934