QUATRAIN  , sometimes spelt Quartain (from Fr. quatre, four), a piece of

verse complete in four rhymed lines . The length or measure of the verse is immaterial, but they must be bound together by a rhyme-arrangement . This form has always been popular for use in the composition of epigrams, on account of its brevity and neatness, and may be considered as a modification of the Greek or Latin epigram at its concisest .