So it was two years later, I was in the business of making plutonium with many friends and colleagues. We were working at Chicago and at the State of Washington, the Du Pont company had been persuaded by General Groves to take on the project of building the plant to make plutonium. In the old days, an alchemist was somebody who proposed to do a fantastic thing but couldn't. But here was alchemistry on an enormous scale. And Du Pont had to depend on these physics considerations to believe that the job could be done. They accepted a fee of $1.00 for the work. But the project, when it was finally turned over by Du Pont, after the war, and it was appraised, was something like $300 million.