Twenty Lines of Homer

I have read of the discipline of a nightly "twenty lines of Homer", which I suppose to include construing, perhaps after copying out, twenty (Greek) lines of The Iliad or The Odyssey every night. At the moment, the only citation I can give is to one of Flann O'Brien's Keats and Chapman stories. One could not in some ways ask for a finer source than O'Brien; one could certainly ask for a more…