Could it be that "the little Harvilles" are actually a bit older than little Charles and Walter? Remembering Walter's climbing intrests and the fact that Mary's boys seem to be a bit spoiled and used to get their own way - well, they might try to "command" and tease the Harville children, who probably are too shy (being guests of the house) and/or polite to avoid the nuisance caused by two hyper-active little boys ;).

I have also a question of my own: Just about how many Musgroves there are supposed to be - or there possibly could be? In the Musgrove family, Charles, Henrietta and Louisa (and poor Richard, maybe? Was he younger or older than the girls, has anyone picked up any line about this in the text?) are the only ones that have reached adulthood, and the rest of the children seem to be old enough to be in school. But how many of them there is? The text makes me always feel like they were at least a dozen or so ;).