Official Despatch of Lieutenant-General Francis Webber to Lord Castlereagh, detailing the assault and capture of the old pump, in Trinity College, Dublin, on the night of the second of December, eighteen hundred and eleven, with returns of killed, wounded, and missing, with other information from the seat of war. HEADQUARTERS, No. 2, OLD SQUARE. My Lord,--In compliance with the instructions contained in your lordship’s despatch of the twenty-first ultimo, I concentrated the force under my command, and assembling the generals of division, made known my intentions in the following general order:-- A. G. O. The following troops will this evening assemble at headquarters, and having partaken of a sufficient dinner for the next two days, with punch for four, will hold themselves in readiness to march in the following order:-- Harry Nesbitt’s Brigade of Incorrigibles will form a blockading force, in the line extending from the vice-provost’s house to the library. The light division, under Mark Waller, will skirmish from the gate towards the middle of the square, obstructing the march of the Cuirassiers of the Guard, which, under the command of old Duncan the porter, are expected to move in that direction. Two columns of attack will be formed by the senior sophisters of the Old Guard, and a forlorn hope of the “cautioned” men at the last four examinations will form, under the orders of Timothy O’Rourke, beneath the shadow of the dining-hall. At the signal of the dean’s bell the stormers will move forward. A cheer from the united corps will then announce the moment of attack. The word for the night will be, “May the Devil admire me!” The commander-of-the-forces desires that the different corps should be as strong as possible, and expects that no man will rema any pretence whatever, in the rear with the lush. During the main assault, Cecil Cavendish will make a feint upon the provost’s windows, to be converted into a real attack if the ladies scream. GENERAL ORDER. The commissary-general, Foley, will supply the following articles for the use of the troops: Two hams; eight pair of chickens, the same to be roasted; a devilled turkey; sixteen lobsters; eight hundred of oysters, with a proportionate quantity of cold sherry and hot punch. The army will get drunk by ten o’clock to-night.