December in May fitly describes the prevailing state of the weather during this month. Chilling winds, accompanied by snow, hail, or sleet showers, engender doubts as to the veracity of the calendar, but the arrival of a number of terns on the 18th dispels all doubts upon the matter. Sojourning in Africa since their departure in September, they invariably make their appearance here in May. At present there are about thirty of these energetic little birds busy diving among the breakers, picking up small fry, among which is seen inch long sand eels. A flock of kittiwake gulls also hunt alongside of them, while several gannets are to be seen further off, plunging in pursuit of larger game. Clustered in sheltering nooks of the rock are numerous patches of ova, deposited by the white whelk. Closely resembling ears of wheat in size and shape, each is attached to the rock by a short footstalk, terminating in a flattened disc. On being pressed, a milky fluid, somewhat granular, is exuded from the free end. The whelks themselves are at present feasting on limpets, whose shells have been fractured by the debris consequent on the alterations in progress, though at other times they do not appear to attack the limpets, their thick shells possibly making the game not worth the candle. Despite the inclemency of the weather, the work in connection with the alterations is being rapidly pushed forward. The removal of the old lantern and parapet wall turned out a more laborious undertaking than the erection of the new ones. Strength and stability were the outstanding features of the old erection, and were carried to such an extent as would probably be considered superfluous in these days. The stone parapet wall would in itself be an eye-opener to our modern jerrybuilders. Octagonal outside, circular within, the wall was composed of five courses of Craigleith freestone, each course feathered and grooved, while each stone dovetailed its entire depth into its neighbour. At each point of the octagon holes were drilled from top to bottom of the wall to receive the two inch iron bolts which secured the heavy cast iron lantern to the parapet. It was necessary to reduce the stones to fragments before hurling them into the sea, in order to prevent them obstructing the boat tracks or damaging the gratings. Between the outer and inner linings of the copper dome a scrap of newspaper was found wrapped round what appeared to be a file handle. The printed matter was quite legible, and bore reference to an unfortunate episode, happily long since relegated to the realms of oblivion, namely, the investigation into the conduct of the then Princess of Wales in 1806. In one of the ventilators which pierced the parapet wall on a level with the balcony, but long since disused, a perfectly desiccated specimen of a wren was found. Attracted probably by the light while on a migratory journey, it had evidently taken shelter in the ventilating tube just prior to its being plugged up