Cubs historical sleuthing: 1939 edition

You might recall this sleuthing post from last December, in which I sleuthed out the April 10, 2000 (Opening Day) date and at-bat that was being taken by Mark Grace.

The photo was sent to me by Michael McNerney, who at the same time sent me a number of photos taken at Wrigley Field by his great-grandmother, Margaret Converse Butler.

You see one of those photos above. Here are two others, taken at the same game:

Margaret Converse Butler

Margaret Converse Butler

Time went by, and I got busy with other things, and last week Michael McNerney emailed me and told me that he had sleuthed out the date these photos were taken.