St. AGNES, SCILLY.—While a strong breeze from the E.S.E. was blowing on the 28th February, the smack Jessie, of Plymouth, which had lost her main-boom, was seen running into a dangerous position and the Life-boat James and Caroline was therefore launched at 5.45 P.M. and proceeded to her assistance. Before theLife-boat could reach her she had succeeded IB getting through a narrow passage between the rocks and then attempted to anchor; but haying lost one of her anchors and chains she had only fifteen fathoms of chain to pay out and that was not sufficient to enable the anchor to obtain a holding. Two of the Life-boat men went on board at the request of the master, got up the anchor, shackled on another chain and securely moored the vessel. On the following day the Life-boat men brought her into the harbour..