Oh - one correction. The spelling is Laurence, not Lawrence.

I've had a rapid flick through teh St FRancis plays, and couldn't find this. But here is a carol from one of them which you might like:

"Who knocks tonight so late?"
The weary porter said.
Three kings stood at the gate;
Each with a crown on head.

The serving man bowed down;
The inn was full, he knew.
Said he, "In all this town
Is no fit place for you."

A light the manger lit;
There lay the Mother meek,
Said they, "This place is fit:
Here is the rest we seek."

They loosed their latchet strings;
So stood they all unshod.
Come in, ye kings, ye kings,
And kiss the Feet of God!