By command of the Admiralty Commissioners notice is given to attend a Committee this afternoon at four a clock at Mr Sprakers chambers about the estimate of the 65 Ships and 8 Fireships to be employed in the Narrow Seas and the Mediterranean, and of the Ships projected for the Plantations and Convoys, altogether amounting to £1128140 ; we desire that one or two of your board will not fail to be there to justify the said estimate.