1838 cover per Steamer Sovereign from Lerwick to Kirkwall rated at 9

1838 entire wrapper addressed to Kirkwall, Orkney Islands, from Lerwick, Shetland Islands, endorsed in manuscript "p Steamer "Sovereign" to Kirkwall" and charged at "9" (d) which is made up from the coastal steamer rate of 8d, plus 1d postage. Bov#11