The analyses of a text #2

The narrator recalls his childhood.
He was forced to work for his own living for Mr. Murdstone's friend Mr. Quinion at London by his stepfather Mr. Murdstone.
When the protagonist started to run away to his grand aunt Miss Betsey, he was robbed his money and box by a porter and then he abandoned pursuing him after a long distance pursuit.
Afterwords, he sold his waist-coat for his travelling expenses.
Now, he is trying to sell his jacket at an drunk eccentric dealer's, but the dealer wants to barter, so he is just waiting for his change of heart outside.

There never was such another drunken madman in that line of business, I hope. That he was well-known in the neighbourhood, and enjoyed the reputation of having sold himself to the devil, I soon understood from the visits he received from the boys, who continually came skirmishing about the shop, shouting that legend, and calling to him to bring out this gold. "You ain't poor, you know, Charley, as you pretend. Bring out your gold. Bring out some of gold you sold yourself to the devil for. Come! It's in the lining of the mattress, Charley. Rip it open and let's have some!" This, and many offers to lend him a knife for the purpose, exasperated him to such a degree that the whole day was a succession of rushes on his part, and flights on the part of the boys. Sometimes in his rage he would take me for one of them, and came at me, mouthing as if he were going to tear me in pieces, then, remembering me, just in time, would dive into the shop, and lie upon his bed, as I thought from the sound of his voice, yelling in a frantic way, to his own windy tune, the Death of Nelson, with an Oh! before every line, and innumerable Goroos interspersed. As if this were not bad enough for me, the boys, connecting with the establishment, on account of the patience and perseverance with which I sat outside, half-dressed, pelted me, and used me very ill all day.
[David Copperfield by Charles Dickens]
I'd like to know "this, and many" refers to the one saying "Rip it open and let's have some!" and others.
I'd like to know if "as" means "while."
I'd like to know an object of "thought" is "the Death of Nelson."
And I'd like to know if "the establishment" refers to Charley's.
Thank you in advance for your help.