Col. Welch received a dispatch from Arlington, Texas, yesterday telling of the sudden death of his niece, Mrs. Clara Helm Gano, who was a daughter of the late Mrs. E. T. Rochester by her first husband, Henry Helm. She married a son of Gen. R. M. Gano, a number of years ago and moved to Texas. Her husband died leaving her with three children. The remains, of course, will be buried with those of her husband and mother in Texas. Mrs. Gano was a lovely woman and had many friends here, who will grieve to learn that she is no more.