And on either side of the barricade were impenetrable woods.

"The stubborn spearmen still made good The dark impenetrable wood, Each stepping where his comrade stood The instant that he fell," as someone or other beautifully says.

French windows, uncurtained, gave onto what seemed an impenetrable wood.

It was like a forest glade, with impenetrable woods on three sides, and a high crag on the fourth.

I had been walking towards a closed door, and by a sudden magic its impenetrable wood became glass, through which I saw myself coming from the other direction, the future.

Kountze describes itself as "The Big Light in The Big Thicket" - a Thicket is that vast area of tangled, often impenetrable woods, streams and marshes.

"The stubborn spearsmen still made good The dark impenetrable wood; Each stepping where his comrade stood The instant that he fell," as I think the "Ingoldsby Legends" beautifully puts it.

In this net-work of fresh waters, threading the otherwise impenetrable woods, the humblest habitation has its boat and landing-place.

Seventy years ago, the Forestry Commission began to plant Corsican pines to stabilize Culbin Sands, and now a complex network of paths crisscrosses tall, dense and almost impenetrable woods.

Lastly, all the masses of impenetrable wood which covered the Serpentine Peninsula were named the forests of the Far West.