Empire of Dreams by Charles Simic, via Pome.

On the first page of my dreambook

It’s always evening

In an occupied country.

Hour before the curfew.

A small provincial city.

The houses all dark.

The storefronts gutted.

I am on a street corner

Where I shouldn’t be.

Alone and coatless

I have gone out to look

For a black dog who answers to my whistle.

I have a kind of Halloween mask

Which I am afraid to put on.