The miller-gun was a little double-barreled tube of toughened glass, with a neat little trick of a spring to it, which upon pressure would let a shot escape.

But the shot wouldn't hurt anybody, it would only drop into your hand.

In the gun were two sizes--wee mustard-seed shot, and another sort that were several times larger.

They were money.

The mustard-seed shot represented milrays, the larger ones mills.