I located a reference to the burial place of RL Lenning, and, possibly, previously unknown Lenning children in the following book at the Dallas Public Library (I'm hoping someone is in that area & could go by to verify the dates):
Little Known Burial Sites & Cemeteries, Etowah Co., AL Cemeteriesby WA Lewis Byrd Cemetery (Blount County) Ida A LenningMay 11 1913May 26, 1915 Samuel T LenningJan 2 1922Mar 20 1913 RL LenningJan 26 1880July 12 1913
Byrd Cemetery was included in this cemetery book for Etowah County because of the numerous Etowah Co residents buried there.There was, at one time, a church nearby.It's located on Highway 278 towards Cullman. 0.3 miles from the Etowah-Blount County line. Turn left onto a dirt road.Cemetery is located behind (what appears to be) chicken houses.