Hi Penny, The will of Elizabeth Henderson dated May 3, 1813 names her son William Laird and her daughter Mary Steel as the heirs and executors of her estate. The will of Mary Steel dated April 1, 1816 names the children of her brother William Laird as her heirs. They are Steel Henderson Lard, Mary Lard, William Lard and Matthew Lard. The will is witnessed by Mary Harris and William Laird. In 1817 Letters of Administration were issued to Jacob Squier and Richard Miles on the estate of William Laird (Captain) late of Newville. The will of Elizabeth Laird dated May 2, 1818 names her children Steal Leard, William Leard and Mary Leard. She requests Benjamin Henderson to keep the boys till they are fit to go to trades and that Mary Laird is to be raised by her aunt Nancy Henderson. All of these are from Cumberland County, Pa. This is all I have on Laird-Henderson. I hope it helps. Please let me know if you happen to find out who William Laird's Father is. All the best. Jay Laird