Check the 1850 federal census for Searsport, Waldo Co. Maine. David and Louisa are listed in Searsport. David was a 45 year old farmer would have been born about 1805. His wife Louisa was then 39, born about 1811.I only have part of the page in my records because they lived near the family of John C. Black, my great-great grandfather. Several of the Black family married Dows. A son of David and Louisa was Josiah who was then 20. Do you have any of the Blacks in your records, especially Ann Eliza, George, or Henry?