Posted by Jon on April 15, 2004 at 14:20:47 from 151.121.50.1 user Jon.
As you might guess from this and my earlier post, I'm re-reading again.
Vicky/Bridgie seems to be growing non-linearly in the series. In SA she turns 2 (the celebrated birthday party on the island), while in SD she's 3, with a 4th birthday coming up (Mother wanted to see how the Swallows' tents were made so she could make a small one for Bridgie's birthday). By the (presumed) next year, in SW, she's already 5, which is possible if we accept those events to be at the end of the summer hols, and post-birthday. However, the two year growth spurt fits better with the publication dates of SA and SD than with the one year difference between the two stories as suggested by internal evidence.