So, we'll go no more a roving the latter part of it, and sitting up late o' nights--had knocked me up a little. But it is over--and it is now Lent, with all its abstinence and sacred music... Though I did not dissipate much upon the whole, yet I find 'the sword wearing out the scabbard,' though I have but just turned the corner of twenty nine." The poem seems to have been suggested in part by the refrain of a Scottish song known as "The Jolly Beggar." The Jolly Beggar was published in Herd's "Scots Songs" in 1776, 41 years before Byron's letter, and goes partially
LL grammar generated by some "ε"-free LL("k") grammar. As allowing more tokens of lookahead makes the parser strictly more powerful, the languages that can be recognized with a LL("k") parser are a strict subset of the languages that can be recognized by a LL("k+n"), "n > 0" parser. This creates a strictly increasing sequence of sets: LL(0) ⊊ LL(1) ⊊ LL(2) ⊊ …. Since these are all DCFLs, a corollary is that for any fixed "k", there are DCFLs that cannot be recognized by a LL("k") parser. An LL parser is called an LL(*) parser if it is not restricted to a