"Marinus of Tyre (AD 70–130)
was a Greek geographer, cartographer and mathematician, who founded mathematical geography and provided the underpinnings of Claudius Ptolemy's influential Geography. Additionally he was quoted by Ptolemy "Marinus says of the merchant class generally that they are only intent on their business, and have little interest in exploration, and that often through their love of boasting they magnify distances". So we can only wonder how much use the information gathered from merchants was.... with the exception of navigating to around and in harbours and, of course trading possibilities. His chief legacy is that he was the first to assign to each place a proper longitude & latitude. He was that well regarded for his advancement o knowledge that a crater on the moon was named after him. The Island GroupingsLooking at Ptolemy's map we can see, other than England, Scotland, Wales & Ireland two groups of islands. One group comprises Anglesey and two smaller, near barren small Islands off the eastern coast of Ireland, Lambay Island being one (and more of that later). Logically & geographically-speaking the Isle of Man should have been in this group."
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