I found this reference to an Orrin Briggs in NEHG Register Vol.126,April 1972,p116-117:
Orrin Briggs, son of Oliver and Rachel of Lyman NH, was named in his father's will as a minor child under the age of 14; there were other children named also and a guardian was appointed for three of them. (Grafton County, NH,Administrations and Guardianships 2:615-624) Oliver Briggs, b date/location unknown, son of Jacob and Mary (Cheney) Briggs; d Lyman NH 1813; mar. Rachel____, she was named in the administration of his will. Jacob Briggs, b Norton MA 9 April 1745; d Lyman NH 1818; mar. Norton 3 Dec 1767 Sarah Cheney, b Norton 30 July 1746; died in Lyman NH, no date known.