A map of the North coast of Britain ... by a geometrical survey done at the
desire of the Philosophical Society at Edinburgh.
Orcades: or a geographic and hydrographer survey of the Orkney and Lewis
Murdoch MacKenzie, surveyor and hydrographer, was employed before 1749 in surveying the Orkney and Shetland Islands for the Admiralty and the East India Company. He communicated his findings to the Royal Society in 1749 in a paper entitled The state of the tides in Orkney and in the following year published these charts of the area. Mackenzie later did surveys of the northern coasts of Ireland and Scotland and in 1760 published A chart of the Atlantic Ocean, drawn on a circular projection which he invented.