crossheadings

Now and then he turned into crossheadings and chambers, as if to escape from their surveillance, but they kept steadily on after him, not taking into account the fact that they were leaving the light they had set at the shaft far out of view.

Boy Scouts in the Coal Caverns Archibald Lee Fletcher

When you find the boat, take a trip down the main gangway here and stick your lights into all the crossheadings and chambers you see.

The Call of the Beaver Patrol or, A Break in the Glacier V. T. Sherman

Now and then he turned into crossheadings and chambers, as if to escape from their surveillance, but they kept steadily on after him, not taking into account the fact that they were leaving the light they had set at the shaft far out of view.

The Call of the Beaver Patrol or, A Break in the Glacier V. T. Sherman