OR, Series 1, Vol. 23, Part 2, Page 664

Chattanooga, March 6, 1863
Col. J. F. Gilmer, Chief of Engineers, Richmond
   Your letter of the 19th of February just received. General Bragg's engineer examined the {Nashville & Decatur Rail} road two months ago. Says the bridges will require at least two months. General Bragg ordered timber to be prepared. I telegraphed on the subject to him.
J. E. Johnston