(From The Wrecker by Robert Louis Stevenson and Lloyd Osbourne, Chapter XIX, published 1892)
Passage 294
The conjunction of these planets seeming ominous, I drew near; but it seemed Bellairs had done his business; he vanished in the crowd, and I found my officer alone.
“Do you know whom you have been talking to, Mr. Sebright?” I began.
“No,” said he; “I don't know him from Adam. Anything wrong?”
“He is a disreputable lawyer, recently disbarred,” said I. “I wish I had seen you in time. I trust you told him nothing about Carthew?”
He flushed to his ears. “I'm awfully sorry,” he said. “He seemed civil, and I wanted to get rid of him. It was only the address he asked.”
“And you gave it?” I cried.
“I'm really awfully sorry,” said Sebright. “I'm afraid I did.”
“God forgive you!” was my only comment, and I turned my back upon the blunderer.
The fat was in the fire now: Bellairs had the address, and I was the more deceived or Carthew would have news of him. So strong was this impression, and so painful, that the next morning I had the curiosity to pay the lawyer's den a visit. An old woman was scrubbing the stair, and the board was down.
Is the word 'deceived' a substantive there or is it the past participle (a verb)? Is this sentence structure natural or is it obsolete? I don't really understand this sentence; could you rephrase it or tell me what is meant by it, please.