Back in August, it was announced that the baseball historian Bernard McKenna had discovered the first known aerial photograph of Maryland Baseball Park, home of the Baltimore Black Sox from about 1921 through 1931.  The photograph was taken in 1927.  Before McKenna found this, the precise location of the park had been unknown.  

Courtesy of Kevin Johnson, here are some “very rough” dimensions for Maryland Park, calculated by Ron Selter:

LF 390
LC 440
CF 440
RC 390
RF 250
Backstop 80

The same photograph also revealed, two blocks south of Maryland Park, the location of Westport Park, the original home field of the Black Sox in the 1910s.