The husk of a man buried in the barrow under the Frobisher mausoleum might have been an ancient Pict or Celt. Picts lived in the northern and eastern parts of Scotland, while Celts lived across the British Isles before the Roman conquest and afterwards in Wales, Cornwall and northwest England.
Picts are known for intricate stone carving and skilled metal work. Evidence of indigo patterned tattoos are found in the Celtic historical record. The markings on the Indigo Man are consistent with those of an ancient warrior tribesman.