Before Sebastopol, May 4.—On Wednesday night the French, under Gen. Pellissier, attacked the advanced works of the quarantine bar-tion, and carried them at the point of the bayonet, taking 12 mortars, and establishing themselves in the conquered position.The following night the Russians made a sortie to recover their position, but were driven back after a bloody encounter.The British Baltic fleet had left Kiel, and the French fleet were also to sail from Cherbourg.The insurrection in Ukraine Russia had extended to other Governments, and twenty lauded proprietors with their families had been destroyed.At St. Petersburg!), every article of consumption was at famine prices.Great Britain.—The loan bill of £16.000.-