“Well, he is, Mr. Swift; and I hope I’m not going against your wishes when I say I wish he wasn’t.”

“Not at all, Mr. Jackson. I have no desire to keep that man if he isn’t doing what is right, though I must admit that he is a good workman.”

“I agree with you there. But after what happened you must use your own judgment about keeping him on.”

“What happened?”

“Well, he and I quarreled.”

“What did Greenbaum do?” Tom asked. He knew he need not ask what his superintendent had done, for Garret Jackson was thoroughly dependable.

“I found him sneaking around your private room, Tom—the room where you have been doing those experiments of late. I don’t know what they are and I don’t want to know until the right time comes. But I felt pretty sure you didn’t want Greenbaum to be prying in there.”

“No more I do!”

“That’s what I thought. So when I saw him come out of that room the second time, after you had gone to find Ned, I called him to account for it.”

“What did he say?”