Minor updates

A state archive holds a letter written by S. T. Tackabury. We're arranging to get a scan, but have low expectations for the letter.

A search by another of a pertinent YMCA archive shows that Adamson probably played a far smaller part in a revival than he suggested to Watch Tower readers. We'll use this result with caution because we didn't make the search ourselves. But even a negative result adds to the story.