Does anyone know when this poem was written?

I know its a long-shot, but i cant find a date for this poem anywhere. So I just wondered if anyone knew what date this poem was written.


Contiencious Objector
I shall die, but that is all that I shall do for Death.
I hear him leading his horse out of the stall; I hear the clatter on the barn-floor.
He is in haste; he has business in Cuba, business in the Balkans, many calls to make this morning.
But I will not hold the bridle while he clinches the girth.
And he may mount by hinmself: I will not give him a leg up.

Though he flick my shoulders with his whip, I will not tell him which way the fox ran.
With his hoof on my breast, I will not tell him where the black boy hides in the swamp.
I shall die, but that is all that I shall do for Death; I am not on his pay-roll.

I will not tell him the whereabout of my friends nor of my enemies either.
Though he promise me much, I will not map him the route to any man's door.
Am I a spy in the land of the living, that I should deliver men to Death?
Brother, the password and the plans of our city are safe with me; never through me
Shall you be overcome.

by-- Edna St. Vincent Millay