The sea had at one time occupied the site where the morass now stood.

These cliffs formed a range extending from north to south.

Their precipitous sides, clothed here and there with trees, marked where the descent was broken by platforms.

Between him and this range the morass extended.

Hazel took note of three places where the descent from these hills into the marsh could, he believed, most readily be made.
On the eastern side and close above him arose the peculiar mountain.