Past the system of the Fenachrone she hurtled; past the last outlying fringe of stars of our galaxy; on and on into the unexplored, awesome depths of open and absolute space.

If indeed that is the case, I would rather venture into its unexplored depths, to discover the coffer of pearls and gems.

According to Tom's calculations, they thought the small submarine should be able to descend easily to the unexplored depths of the ocean.

Horton is a man of unexplored depths, however.

This was the moment when Don felt like a god, able to hold within his hands a circle of the Pacific twenty miles across, and to see clear down to the still largely unexplored depths two thousand fathoms below.

And so we commend them to the unexplored depths of a planet which will be their final resting place.

Something catastrophic is taking place in the distant and totally unexplored depths of Africa, from where the mighty river springs.

The elevator was descending into the unexplored depths of the cliff.

The Boche has unexplored depths.

Northeast to Jallywig and the unexplored depths of Boughbound Forest.