-- Jens Zorn 23 November 2021

Hi George,
The photos you sent were certainly taken in Randall Lab, probably in one of the warren of lab rooms on the 4th floor. 
I'd guess that they were taken  in the late '40s (slide rule and old typewriter, but no trace of gray hair)

I don't have a firm date for the Avon house photos, but they were taken within a couple of years of its sale to new owners.

Things with us are going in a predictable way, given the passage of years.  We now have 24/7 care, with the upside that our principal caregiver is a wonderful cook.

Thanks for your offer of help that reaffirms our belief that Ann Arbor is a city of good neighbors.

Jens