the tall proud tomes that cast a golden penumbra in an angle of the drawing room were not—as he had dreamed in his vanity—a mirror of the world, but simply one more thing added to the universe

a penumbra of 'private investigators'

You enter the penumbra of the lowered blinds

the echo of a vanished knowledge revealed in the penumbra and in tacit allusions.

I was still in a penumbra of inurement to death

a cultural explosion whose penumbra leaks out

upon awakening in the early morning I made a tent of my bedclothes and let my imagination play in a thousand dim ways with shadowy snowslides of linen and with the faint light that seemed to penetrate my penumbral covert from some immense distance

too preoccupied, in the penumbra, with ghosts

our penumbral constitutional right to privacy

a single file of passers-by, stooped and penumbral and annihilated by the vertical power of the supertalls

in that penumbra of Science called chemistry

create a great penumbra of imagined difficulty and mystification throughout the whole poem

The penumbra of the Holocaust hangs over him

Four thousand new analyses appear at once, trailing a penumbra of several million tweets