Dear Else, I have not researched the THOMPSON sisters, but I do have info on Mason and John ALDEN.Prince ALDEN and Mary FITCH had eight children and I believe the Family Group Record and Pedigree Charts listed at the LDS are accurate on this family. This line is fairly well-documented and I was able to confirm most of it thru a second source(The Alden Website, The DAR, Overfield Cemetery, Meshoppen, PA, The Fitch Cemetery, Lockville, PA, The Sharon[CT] Historical Society, The Winthrop Society, The History of Wyoming County by George Kulp, a family bible, Federal and State Census records, etc...) Part of an account from Rex Mowry: "Mason Fitch Alden came to Wyoming Valley with his father[Prince Alden]...Mason..with his brother John erected the first forge for manufacturing iron...at Nanticoke Creek on the Susequehanna River in 1776.Prince Alden purchased a large tract of land lying in the Hanover and Newport Townships, anthracite coal land, where the present town of Alden now is..."
I also have a connection to the MOWRY line(Mason and Mary Thompson's daughter, Abigail ALDEN, married Ezekial MOWRY, a descendant of a lesser famous early(1630) settler, Roger Mowry of the Winthrop Fleet.
These families began in England, traveled to the new world, settled Plymouth, MA, Providence, RI, Litchfiled, CT and the Wyoming Valley in PA.They fought the British, the Indians, and later in the War of 1812 and the Civil War.
I'm sending you info privately but will also post on the ALDEN, FITCH, GAY, MOWRY and THOMPSON genforums to see if any one out there is interested in these two women.