iron coloured; but from the blood which slightly moistened the face of the instrument, we were satisfied it must have been animated. I showed the fragments of both to a gentleman in the island, who, like myself, lamented the accident, as it had, in all likelihood, deprived science of forming some valuable (perhaps) deductions on this incarcerated, or (if I may be allowed the expression) compound phenomenon. I have merely related the above incident in order to show the possibility of there being other creatures accessible to discovery under similar circumstances, and in their nature, perhaps homogeneous. I left the island next day, and therefore had no further opportunities of confirming such an opinion; but the place itself abounds with substances which would authorize such conjectures. D. A. P.[1] [1] We thank our correspondent for the above communication on one of the most interesting phenomena of British geology; for, as we hinted in our last, the pleasantest hours of our sojourn at Margate, about three years since, were passed in the watchmaker's museum, nearly opposite the Marine Library, which collection contains many Sheppey fossils, especially a _prawn_, said to be the only one in England. We remember the proprietor to have been a self-educated man: he had been to the museum at Paris twice or thrice, and spoke in high terms of the courteous reception he met with from M Cuvier; and we are happy to corroborate his representations. With respect to the _reptile_, or, as we should say, _insect_, alluded to in the preceding letter, we suppose it to have been a vermicular insect, similar to those inhabiting the _cells_ of _corallines_, of whose tiny labours, in the formation of coral islands, we quoted a spirited poetical description in No. 279 of the MIRROR. Corallines much resemble fossil or petrified wood; and we recollect to have received from the landlady of an inn at Portsmouth a small branch of _fossil wood_, which she asserted to be _coral_, and _that_ upon the authority of scores of her visiters; but the fibres, &c. of the wood were too evident to admit of a dispute. * * * * * ANTICIPATED FRENCH MILLENNIUM, OR THE PARISIAN "TRIVIA." (_For The Mirror._) "Travellers of that rare tribe, Who've _seen_ the countries they describe." HANNAH MORE. When daudling diligences drag Their lumbering length along[2] no more-- That odd anomaly!--or wag Gon call'd, or coach--a misnomer[3]-- That Cerberus three-bodied! and That Cerberus of music! Such rattle with their nine-in-hand! O, Cerbere, an tu sic? When this, (and of Long Acre wits To rival this would floor some!) When this at last the Frenchman quits. Then! then is the _age d'or_ come!