Myriads of medusae or jellyfishes are constantly streaming past our door, apparently without any powers of volition of their own, but helplessly at the mercy of the tides. Of various sizes, shapes, and colours, they impart quite a gay appearance to the seascape, somewhat resembling a grassy sward carpeted with beautiful flowers--huge sunflowers predominating--the whole moving silently just beneath the green, glassy surface. Great tremulous discs, twelve inches in diameter, trail their streaming tentacles several feet behind them; others, again, no larger than a pea possess the power of radiating, from the ciliary bands with which they are furnished, all the colours of the rainbow. Stranded high and dry, what a contrast to their former glory, now an inert mass of slobbery mucilage. At one period of their existence they appear quite plant-like in their habits. Attached to the rocks, they closely resemble miniature fir trees, each plant ultimately producing whole colonies of juvenile medusae. Fish have been fairly plentiful this month, but owing to the work at present in progress we have but little time to avail ourselves of the opportunity. On the 6th a red chequered pigeon, stamped “J. B. Sollaway, Beeston,” on wing, was released after a night’s detention. On Saturday the 12th, other two pigeons were captured at 8.30 p.m. One a red chequered homer, with aluminium ring on leg marked N.U. 01, H.A. 587, also rubber racing ring on other leg, marked 132 outside and 263 Q inside; the other a blue chequered homer, with leg ring marked N.U. 99, C. 8953, and racing ring marked Q 513 inside and 174 outside; wing feathers stamped “Walter H. Walker, Bank House, Horsforth, Leeds.” Both pigeons, after being watered and fed, were released at 11 a.m. on 13th, each steering a sou’-westerly course from the Rock. On the evening of Sunday the 27th our new light was exhibited for the first time, the coveted honour of “first light” falling in the ordinary routine of duty to the writer. The new apparatus--a bewildering arrangement of massive glass prisms--is in striking contrast with its predecessor, the old reflector system of lighting, a system, by the way, now almost obsolete. The following description of the new light is copied from an engraved plate affixed to the new apparatus:--“Combined hyper-radiant and 1st order apparatus, with equiangular dioptric elements and catadioptric back prisms; power of red flash and white flash equalised. White and red flashing light, showing white and red flashes alternately every half minute, the period being one minute. Designed by Messrs Stevenson, Civil Engineers, Edinburgh. Contractors, Messrs Steven & Struthers, Glasgow, and Messrs Société Des Etablissements Henry Lepaute, Paris. David A. Stevenson, Engineer to the Board. Apparatus makes one revolution in one minute--1901.”