(From The Wrecker by Robert Louis Stevenson and Lloyd Osbourne, Chapter XVII, published 1892)
Passage 264
“And what—what sort of a gentleman was this Mr. Carthew?” I gasped.
“The ward-room steward told me he was come of the best blood in England,” was my friend's reply: “Eton and 'Arrow bred;—and might have been a bar'net!”
“No, but to look at?” I corrected him.
“The same as you or me,” was the uncompromising answer: “not much to look at. I didn't know he was a gen'lem'n; but then, I never see him cleaned up.”
“How was that?” I cried. “O yes, I remember: he was sick all the way to 'Frisco, was he not?”
“Sick, or sorry, or something,” returned my informant. “My belief, he didn't hanker after showing up. He kep' close; the ward-room steward, what took his meals in, told me he ate nex' to nothing; and he was fetched ashore at 'Frisco on the quiet. Here was how it was. It seems his brother had took and died, him as had the estate. This one had gone in for his beer, by what I could make out; the old folks at 'ome had turned rusty; no one knew where he had gone to. Here he was, slaving in a merchant brig, shipwrecked on Midway, and packing up his duds for a long voyage in a open boat. He comes on board our ship, and by God, here he is a landed proprietor, and may be in Parliament to-morrow! It's no less than natural he should keep dark: so would you and me in the same box.”
I take 'as had the estate' to be a relative clause relating to 'him'. Then, 'as' must be a relative pronoun, right?