Yesterday Lyndhurst and Brougham both came to the Council Office to hear the first application for the renewal of a patent, and though there was no opposition, they scrutinised the petition and evidence with the utmost jealousy, which they did in order to intimate that the granting a prolongation of the patent, even when unopposed, was not to be a matter of course. It was a pianoforte invention, and the instrument was introduced into the Council Chamber, and played upon by Madame Dülcken for the edification of their Lordships.