Image taken from: Title: "Historia de Galicia" Author: MURGUÍA, Manuel. Shelfmark: "British Library HMNTS 10161.d.6." Volume: 02 Page: 617 Place of Publishing: Lugo Date of Publishing: 1865 Issuance: monographic Identifier: 002588039 Petroglyphs from Eira dos Mouros in "A Cividade", S. Xurxo de Sacos (Cotobade), province of Pontevedra (Spain).