No one well acquainted with mediæval literature will deny that the tail-rhyme strophe was a favorite stanza form in English poetry of the thirteenth and fourteenth centuries. When we meet, in any period of literature, such a fashionable garb of thought, an interest is roused to discover, if possible, whence it comes, and why it prevails. For instance the heroic couplet, darling of the eighteenth century, has had many students. That had its vogue in an age we know well, and we can easily discover its origin and the cause of its popularity, but it is quite otherwise with the tail-rhyme strophe. Although recognized as important, it has never been discussed in all its bearings, nor has its origin and history ever been generally acknowledged or established. In the following paper, an effort is made to bring together and examine the various theories of its origin, to investigate its forms and history in Latin, French and English poetry, and to trace the connections, if any, of the form in the three literatures. In brief, it aims to be the biography of the tail-rhyme strophe.