The train to Portsmouth by the direct Portsmouth line, which leaves Waterloo terminus at 7 P.M., met with an accident an evening or two since, which might have proved a most serious one. Between Liss and Petersfield all the carriages but the one attached to the engine were thrown off the rails, and but for the presence of mind of the driver, who stopped the engine as soon as he perceived there was danger, the whole train would have been precipitated down an embankment, and dashed against some posts and rails beyond. Except the delay and the alarm, no one suffered any inconvenience. It is conjectured that the accident arose from the sleepers becoming misplaced in consequence of the late heavy rains.