Uhhmmmm kinda spacing and tired here after really stressful day and late night (I really was on the treadmill at midnight) and I never sleep well after I post. In any event, the time is that is the last week in August 1942. Sept. 2 is a Wednesday and that's when Lucy and Polly go to Caxton Hall. I think they leave for school thereafter. So, there have been at least 2 years where she's observed the changes, most notably when they came back from the Professor's after the blitz (which the timeline says was 1940). I'm not sure how long that was, but I assume there was at least one summer and Christmas holiday. Sometime after they went back to school, Mrs. Pevensie went to speak to the Professor and Polly. I think she gave it a few months and compared her children to the others also evacuated and comes away thinking WHAT? Huh? And of course, with John Pevensie away, for months and years, he sees none of this at all.

Thanks again!!