I sat around for quite a while after Helen left, doing a lot of thinking. And what I was thinking was that even if I didn’t care too much about Lewis, he was the only man I knew who might be able to help me out.

So I put the bogus fountain-pen and the three-eyed glasses in the drawer and put the counterfeit Bildo-Block in my pocket and went across the street.

Lewis had a bunch of blueprints spread out on the kitchen table, and he started to explain them to me. I did the best I could to act as if I understood them. Actually, I didn’t know head nor tail of it.

Finally, I was able to get a word in edgeways and I pulled the block out of my pocket and put it on the table. “what is that?” I asked.

I expected him to say right off it was just a child’s block. But he didn’t. There must have been something about it to tip him off that it wasn’t just a simple block. That comes, of course, of having a technical education.

Lewis picked the block up and turned it around in his fingers.

“What’s it made of?” he asked me, sounding excited.

I shook my head. “I don’t know what it is or what it’s made of or anything about it. I just found it.”

“This is something I’ve never seen before.” Then he spotted the depression in one side of it and I could see I had him hooked. “Let me take it down to the shop. We’ll see what we can learn.”

I knew what he was after, of course. If the block was something new, he wanted a chance to go over it—but that didn’t bother me any. I had a hunch he wouldn’t find out too much about it.

We had a couple more beers and I went home. I hunted up an old pair of spectacles and put them on the desk right over the dot.