Nobody talks about Bossuet much in meta terms, unless it's to complain that "unlucky" and "clutz" are not synonyms, but maybe we should.
Hugo deliberately sets Lesgle apart in several ways from the other students:
1) He does not come from the Midi
2) We know precisely what his father did for a living
3) The exact nature and scope of his family property is specified
There are a few things here to parse. For one, in not coming from the south, Lesgle is not a foreigner in Paris. Meaux is in the Paris basin; even if one logically argues that he came to Meaux only when his father was granted the directorship of the post office there, he is most proximately from the same pays
in which he currently resides. In a world where there is a distinct north/south sociocultural divide, Lesgle is in his own territory. The others have to contend with the north/south divide on a daily basis - accents can mark them as foreign, the notion that heat does terrible things to a man's brain and that's why creoles are little better than Africans and look at the mess that is Italy so of course our southern departments are backwards compared to our northern industrial giants, etc. This is interesting! The rest of them are, if not quite misfits in Paris, possibly drawn to each other for cultural reasons. They are together, rather than scattered among other revolutionary groups, because of a shared socio-cultural background. Lesgle, as a native, is therefore an outsider in this group. He may be attracted to it for reasons beyond an incredibly close friendship with Joly.
As for part 2, I've done a bunch of digging on the postal service, and I've posted the results here
. In short, the details Hugo gives us lead me to believe Lesgle has had a more uprooted life than was typical even for that era of war. This may explain part of why he doesn't seem to much mind jags of homelessness - he wasn't properly rooted even before he lost his inherited tie to the land, so couch surfing doesn't engender the same feeling of dynastic failure that someone who lost serious property might have.
It wasn't even much in terms of property - Lesgle family was either on the way down without Bossuet's help anyway, or he simply failed to achieve another rung on a precarious social ladder that there wasn't enough family backing for anyway. A house and a field are nice, as is the directorship of a post office, but they aren't enough to qualify to vote, and socially, you are probably poorer than the other government functionaries in Meaux except for the police commissioner, so your social group is economically out of your league. Losing the property meant losing the income, but having the property was probably doing Lesgle little good in Meaux in the ways that matter. This may also have made it easier to shrug off the loss.
So, let's think about poor Bossuet, always facing Mephistopheles cheerfully. I suspect he gets little thought because he faces his misfortunes so well that he convinces everyone else to forget them, too.
What kind of literature and what kind of life is the same question. - Tom Stoppard