...ok up in rear of it. Sedgwick, now opposed by Wilcox with a single brigade, advanced very cautiously up the plank road towards Chancellorsville. At Salem Church, half way between Fredericksburg and Chancellorsville , Wilcox held him in check until McLaws arrived with four brigades, about the middle of the afternoon. These troops had aided in defeating Hooker in the morning, and now put a stop to all further pr...