By Loretta Fulton David Auld, executive chairman of the board of D.R. Horton homebuilders, based in Arlington, will be the next speaker in the Fletcher Lecture Series at Hardin-Simmons University. Auld’s presentation will begin at 11:30 a.m. Tuesday, Oct. 27, in HSU’s Houston-Lantrip Center on Pine Street.  Registration deadline is Oct. 19. The lectures are free, but registration is required.