Sandy has a plate (page 20) of "The Roman Sacellum of Mars Signifer, vulgarly called 'Arthur's Oon.' With regard to its shape, it is not unlike the famous Pantheon at Rome before the noble Portico was added to it by Marcus Agrippa." Gordon agrees with Stukeley in attributing Arthur's Oon to Agricola, and here Monkbarns and Lovel adopt almost his words.

"Time has left Julius Agricola's very name on the place;.

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and if ever those initial letters J.A.M.