midnight
and hastily environed the camp with palisades and trenches . He had intended to have rested immediately in front of the foe , but , in the darkness , mistook the extent of the hostile line ; and his men were ranged only opposite to the left side of the earl 's force -LRB- towards Hadley -RRB- , leaving the right unopposed . Most fortunate for Edward was this mistake ; for Warwick 's artillery , and the new and deadly bombards he had constructed , were placed on the right of the earl 's army ; and the provident earl , naturally supposing Edward 's left was there opposed to him , ordered his gunners to cannonade all night . Edward , `` as the flashes of the guns illumined by fits the gloom of midnight , saw the advantage of his unintentional error ; and to prevent Warwick from discovering it , reiterated his orders for the most profound silence . '' -LSB- Sharon Turner . -RSB- Thus even his very blunders favoured Edward more than the wisest precautions had served his fated foe . Raw , cold , and dismal dawned the morning of the fourteenth of April , the Easter Sabbath .