LONDON, Sept. 9.--The accounts of the number of men in the Seaham colliery pit vary. The pit consists of five seams, one below another; the shallowest seam is 460 feet below the surface.

LONDON, Sept. 8.--An explosion occurred this morning in the Seaham Colliery, near Durham. Both shafts of the mine are blocked, though they are half a mile apart.