Here is a somewhat tongue-in-cheek trace poem of D.H. Lawrence’s “Moon Memory.” (You can read the original here.)
When the fog rises in a student’s mind
grey and clammy, as in the green shadow of a copse
pooling together, and sticking to his skull –
then the tranquil, ordered thought-world
exists no more, nor ever truly existed;
this thick grey dullness
oozes, and drips seeping, drifting sideways, muggily against his skull,
on his thoughts that are verdant forest within him.
And through the sticking of the grey sponge of the fog
furry creatures enveloped plunge inward and grow dim
in muddy gloom of torpor, leaf-enveloped torpor
in the sleepy, sludge-ridden blockage of ordered thought
that has left the woods in pea soup, even in daylight.