1849 cover from Shetland Isles HILLSWICK to Edinburgh

1849 an entire wrapper from Hamnavoe, West Burra, Shetland addressed to Edinburgh with an 1841 1d red-brown issue tied by the Lerwick "223" 1844 numeral being dated on reverse for AU 25 1849 and bearing the "Hillswick" local handstamp in blue black ink. A very scarce cover.. Bov#428