You've won," he acknowledged.

"But, Billy,"-- his manner changed suddenly--"I wonder if you know just what a hole you left in the Strata when you went away." "But I couldn't have--in the whole Strata," objected Billy.

"I occupied only one stratum, and a stratum doesn't go up and down, you know, only across; and mine was the second floor." Bertram gave a slow shake of his head.
"I know; but yours was a freak formation," he maintained gravely.

"It DID go up and down.

Honestly, Billy, we did care--lots.