there was a hole in Mr. Franklin’s pocket that nothing would sew up. Wherever he went, the lively, easy way of him made him welcome.
It seems that Collins is almost, but not quite, setting Mr. Franklin up to be the Victorian "rake" stereotype.
(From wikipedia: "In a historical context, a rake (short for rakehell, analogous to "hellraiser") was a man who was habituated to immoral conduct, particularly womanising. Often, a rake was also prodigal, wasting his (usually inherited) fortune on gambling, wine, women and song, and incurring lavish debts in the process.")
I say almost because, even though this description is classic "rake" behavior, the narrator seems invested in seeing the good in Mr. Franklin, and the narrative seems to be somewhat invested in redeeming him (unless that's just to throw us off). Overall, I find it interesting that this novel seems to simultaneously present stereotypical and tropey characters, but at the same time complicate them and present their contradictions and complexities.