This attracted the curious senses of the masters at first. But later on, they started to drop their attempts to break through William's arrays and see what he was doing.
Every single time William went inside, he'd come out with many scrolls, having lots of useful information. "This is your share according to the contract," he said these words every single time he came out and handed these scrolls over.
He didn't need to make the use of any of his knowledge about the outer world. There was lots of useful intel inside the scrolls related to the outer world, alongside much bullshit as well.
William even stopped reading scrolls related to the outer world issues after the first week passed. He got enough scrolls and data to satisfy the needs of the city owners for months.