Though deeper within darkness
Is entering the loneliness:
Cold, delicately as the dark snow
A fox's nose touches twig, leaf;
Two eyes serve a movement, that now
And again now, and now, and now
Sets neat prints into the snow
Between trees, and warily a lame
Shadow lags by stump and in hollow
Of a body that is bold to come
Across clearings, an eye,
A widening deepening greenness,
Brilliantly, concentratedly,
Coming about its own business
Till, with a sudden sharp hot stink of fox
It enters the dark hole of the head.
Two more long, slow adverbs complete the description. The meaning of the two words in this context are similar, a device known as  hendiadys .
The Thought-Fox