If that is accurate, further information can be found on him in The Ladd Family by Warren Ladd, 1890, p. 46.
Sources
"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MWZZ-6SR : accessed 29 April 2016), Henry M Pearsons, Gilmanton, Belknap, New Hampshire, United States; citing family 305, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).