The house met about 10 o'clock, and proceeded soon after 11 to Westminster-hall, to attend the trial of lord viscount Melville. Their lordships returned about half past 4, when an order was made to proceed further on the trial on Monday, and a message was sent to the Commons to acquaint them therewith.—Lord Holland presented petitions from the prisoners confined for debt in Horsham gaol, Sussex, and the Marshalsea, Dublin, praying for relief, which were ordered to lie on the table.—Lord St. Vincent's Annuity bill and the Longitude bill passed through committees, and were reported.