Some One by Walter de la Mare

Some One by Walter de la Mare
Some one came knocking
At my wee, small door;
Someone came knocking;
I'm sure-sure-sure;
I listened, I opened,
I looked to left and right,
But nought there was a stirring
In the still dark night;
Only the busy beetle
Tap-tapping in the wall,
Only from the forest
The screech-owl's call,
Only the cricket whistling
While the dewdrops fall,
So I know not who came knocking,
At all, at all, at all.