...ests of ammunition for the critical moment, in case the batteries engaged in the preliminary cannonade should be so cut up and exhausted as to be slow in getting up. About 11 A. M. the skirmishers in A. P. Hill 's front got to fighting for a barn in between the lines, and the artillery on both sides gradually took part until the whole of Hill's artillery in position, which I think was 63 guns, were heavily e...