"Don't you understand?
Haney, or somebody, killed Mr.Kellner and stole some uncut diamonds--you must have seen the newspaper account of it to-day.
The New York police traced Haney's course to Coaldale and to that house.

But all _they_ know is that sixty thousand dollars' worth of uncut stones were stolen.

There was not even a suggestion to them of the millions and millions of dollars' worth that were manufactured.
Don't you understand?
I permitted myself to be accused and arrested, knowing I could establish an alibi, in order to lead them away from there and gain time, at least, to give Mr.Wynne an opportunity of hiding the other diamonds, if they were there.

He understood what I was trying to do, and fell in with the plan.

He knew that _I_ knew the diamonds were made.