My Hand is Weary with Writing

[from the Great Book of Gaelic]:
"My hand is weary with writing,
My sharp quill is not steady,
My slender-beaked pen jets forth
A black draught of shining dark-blue ink.

A stream of wisdom of blessèd God
Springs from my fair-brown shapely hand:
On the page it squirts its draught
Of ink of the green-skinned holly.

My little dripping pen travels
Across the plain of shining books,
Without ceasing for the wealth of the great?
Whence my hand is weary with writing."