"Grace of Maine", Secretary's Office, full-front patriotic cover, franked with 2c Black Jack, tied by segmented cork cancel and "Augusta ME / Jun / 18" c.d.s., paying the circular rate, to Bowdoinham, Maine, from the Davis Printing Co. series printed for Maine's official offices, trivial wrinkles, an exceptionally attractive Black Jack cover; with 2023 Philatelic Foundation certificate.