The analyses of a text #1

The narrator recalls his adolescence.
Peggotty, the narator's old nurse's niece Em'ly fled with the narrator's best friend Steerforth to somewhere on the day when Peggotty's husband's funeral was held , leaving her fiance, her cousin Ham.
Mr. Peggotty, Peggoty's elder brother is about go to London with the narrator to seek for his niece the day after next.

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'Mas'r Davy,' Ham whispered, drawing me aside, while Mr. Peggotty was stowing his bag among the luggage, 'his life is quite broke up. He doen't know wheer he's going; he doen't know -what's afore him; he's bound upon a voyage that'll last, on and off, all the rest of his days, take my wured for 't, unless he finds what he's a seeking of. I am sure you'll be a friend to him, Mas'r Davy?'
'Trust me, I will indeed,' said I, shaking hands with Ham earnestly.
'Thankee. Thankee, very kind, sir. One thing furder. I'm in good employ, you know, Mas'r Davy, and I han't no way now of spending what I gets. Money's of no use to me no more, except to live. If you can lay it out for him, I shall do my work with a better art. Though as to that, sir,' and he spoke very steadily and mildly, 'you're not to think but I shall work at all times, like a man, and act the best that lays in my power!'
I told him I was well convinced of it; and I hinted that I hoped the time might even come, when he would cease to lead the lonely life he naturally contemplated now.
'No, sir,' he said, shaking his head, 'all that's past and over with me, sir. No one can never fill the place that's empty. But you'll bear in mind about the money, as theer's at all times some laying by for him?'
[David Copperfield by Charles Dickens]
1. I'd like to know what "though as to that" means.
2. I'd like to know if "you're not to think but I shall work at all times" means "you shouldn't think that I won't work at all times."
3. I'd like to know why there is "with."
4. And I'd like to know if some refers to Ham.
Thank you in advance for your help.