For much learned lore relating to this remarkable plant, see the _Encyclopædia Metropolitana_. Your querist ACHE may be assured that the Mistletoe may be often found in the counties of Devon and Somerset growing on oaks, and frequently on old apple-trees in neglected orchards. A specimen of it may also be occasionally found on other trees the bark of which is rough, such as the acacia and some species of willow, when of large size. I have heard of an instance of its growing in a furze-bush. S. S. S. _Spelling of "Britannicus"_ (Vol. iii., p. 275.).--If R. W. C. will turn to Akerman's _Coins of the Romans relating to Britain_, he will find, at p. 36., the description of a brass medallion of Commodus having on the reverse a legend commencing "BRITTANIA P. M. TR.," &c. The author observes: "The spelling of Britannia is worthy of observation. Dr. Charles Grotefend thinks it is from the Greek, Βρεττανια." And in a Note to this adds: "That in Horace and Propertius, the first syllable of Britannia is short, but in Lucretius, on the contrary, it is long." I would further observe, that the same mode of spelling "Britannia," with two _t_'s, obtains on the coins of Severus, Caracalla, and Geta. J. COVE JONES. Temple, April 17. 1851. _T. Gilbert on Clandestine Marriages_ (Vol. iii., p. 167.).--Thomas Gilbert, the author of the MS. treatise mentioned by your correspondent, was the son of William Gilbert, of Priss, in Shropshire. He was born in 1613, and at the age of sixteen entered the University of Oxford. He took the degree of M.A. in 1638, and was afterwards appointed minister of Upper Winchington, in Buckinghamshire. He joined the Puritan party at the beginning of the rebellion, and was made vicar of St. Lawrence, Reading. Wood says that he turned Independent, "was actually created Bachelor of Divinity in the time of the Parliamentarian visitation," and was preferred to the rich rectory of Edgmond, in his native county of Shropshire. Being very active against the Royalists, he was commonly called the "Bishop of Shropshire." After the Restoration he was, of course, ejected, when he retired to Oxford, and lived obscurely many years, with his wife, in the parish of St. Ebbs. He lived latterly upon charity, and died in the extreme of poverty, in the year 1694. For more minute particulars of the life of this person, and a catalogue of his writings, see Wood's _Athenæ Oxon._, edit. Bliss, vol. iv. p. 406. EDWARD F. RIMBAULT.