Don't know how helpful this is but I have a note on file that states,"There were five children in this family (I have found 6), Jane who is our ancestress (my ancestor), Mary Ann who married a Glasson (haven't found that marriage),Elizabeth who married a Sargeant(found that marriage) who was a banker in England Will or William who evidently came to America, he left money to people in England and Richard who played in the Queen's band. There is mention of Richard in the Boucher Journal. " Great Aunt Mary Ann Brooks Glasson was little Grandma's one sister. She always called on or began her letters to Dad " Dear Little Tommie". The children and their children are all in Michigan yet and 1st cousins of Dads these quite wealthy in the copper county at Calumet". Found a James Glasson with a Mary Ann, in Calumet, Michigan. Her death gives her father as Wm Bruks (Brooks).Didn't find anything in my files on a Glessing. Which William Brooks is brother to your James?