It was Sim's voice; and here was Sim's cave.

It was a cleft in the side of the mountain, high enough and broad enough for a man to pass in.

Great bowlders stood above and about it.
The sun could never shine into it.

A huge rock stood alone and apparently unsupported near its mouth, as though aeons long gone by an iceberg had perched it there.

The dog would have bounded in upon Sim where he sat and sang at his work, but Ralph checked him with a look.
Inexpressibly eerie sounded the half-buried voice of the singer in that Solitary place.