#813 Anna Ritchie and Graham Ritchie - The Ancient Monuments of Orkney. Her Majesty's Stationery Office, Historic Scotland, 1990, 3rd edition, 2nd impression. #AnnaRitchie #GrahamRitchie #HMSO #HistoricScotland #Orkney #Archaeology #StandingStoneSunday #BookOfTheDay

#720 Graham Ritchie and Mary Harman - Exploring Scotland's Heritage: Argyll and the Western Isles. Her Majesty's Stationery Office, The Royal Commission on the Ancient and Historical Monuments of Scotland, 1990, 1st edition, amended reprint. #GrahamRitchie #MaryHarman #HMSO #RCAHMS #Scotland #Argyll #Hebrides #Archaeology #History #BookOfTheDay