But this is not the principal object of my present communication, which relates to one of the heroines of Munday's drama--a daughter of Llewellin, Prince of North Wales. To her the name of Sidanen is given, and she is constantly spoken of as "the fair Sidanen," with the additional information, in one place, that "sonnets" had been written in her praise. Every person who sends a Query must plead ignorance, and mine may be great as regards Welsh poetry, when I inquire, who was Sidanen, and where has she been celebrated? By the second volume of _Extracts from the Registers of the Stationers' Company_ (printed for the Shakspeare Society), it is evident that she was well known about the middle of the reign of Elizabeth, for on p. 94. I read the following entry:-- "xiii Augusti [1580] "Rich. Jones. Rd. of him for printinge a ballat of brittishe Sidanen, applied by a courtier to the praise of the Queen." British Sidanen probably meant Sidanen of Ancient Britain, or Wales, to whom some unnamed and adulatory courtier had compared Queen Elizabeth. I fancied also that I recollected, in Warner's _Albion's England_, some allusion to Elizabeth under the name of Sidanen, but I cannot at present find it. As I have my pen in hand, may I add another word, quite upon a different subject: it is upon the _nimium_ (pardon the word) _vexata questio_ about _esile_, as it is spelt in the first and second folios of _Hamlet_. Have any of your correspondents, from MR. SINGER to MR. CAMPKIN, with all their learning and ingenuity, been able at all to settle the point? Surely, then, I cannot be blamed for not taking upon me dogmatically to decide it eight years ago. I stated the two positions assumed by adverse commentators, and what more could I do? What more have your friends done? The principle I went upon was to make my notes as short as possible; and after pages on pages have been employed in your miscellany, it seems, in my humble judgment, that the case is not one jot altered. _Esile_ may still either mean vinegar (eyesel) or the river Eisell. J. PAYNE COLLIER. SWEARING ON THE HORNS AT HIGHGATE. Can any of your readers give a satisfactory explanation of what Lord Byron, in the LXXth stanza of the first canto of _Childe Harold's Pilgrimage_, calls the _worship of the solemn horn_? The whole stanza is as follows: "Some o'er thy Thamis row the ribbon'd fair, Others along the safer turnpike fly; Some Richmond Hill ascend, some send to Ware, And many to the steep of Highgate hie. Ask ye, Boeotian shades! the reason why? (15) 'Tis to the worship of the solemn Horn, Grasp'd in the holy hand of mystery, In whose dread name both men and maids are sworn, And consecrate the oath with draught and dance till morn!" And the note (15) merely refers to the poet's writing from Thebes, the capital of Boeotia.