midnight
The grey troops awaiting orders , wondered , `` Are n't we going to cross the river after them ? '' `` Oh , let it alone . Old Jack knows . '' Toward midnight , in the midst of a great access of lightning , rain , and thunder , fighting was renewed . It was not for long . The guns fell silent again upon Loudoun Heights ; moreover the long lines of couching infantry saw by the vivid lightning the battery horses come up , wet and shining in the rain . From regiment to regiment , under the rolling thunder , ran the order .