On the West Penwith moors, in the far west of Cornwall (Great Britain) can be found several Neolithic Quoits. Prominent amongst those is Mulfra Quoit, the remains of a collapsed single chamber megalithic tomb. The Quoit is one of several Neolithic monuments ranging from quoits to stone circles to standing stones and holy wells which are care for by CASPN, the Cornish Ancient Sites Protection Network.
     The graffiti takes the form of the outline of what appears to be two alien figures and was first spotted by Cheryl Straffon of CASPN. Cheryl is quoted as saying, on the CASPN Facebook page, "The new year has started with the first graffiti on an ancient site. These figures have been painted on one of the uprights of Mulfra Quoit. Fortunately it is grey paint that can be removed, but one wonders at the mentality of people who will disrespect an ancient site in this way".
     Further speculation on the nature of the graffiti points towards images of Cloud and Rain spirits from Australian aboriginal folklore. After discussions between Historic England, Penwith Landscape Partnership and CASPN it appears the images were drawn using charcoal and so will need specialist treatment to be removed.

Edited from Cornwall Live (8 January 2020)