"Orkney" GENUKI quoting census data. Retrieved 8 September 2013.
geograph.org.uk
This island is at (grid referenceNF860580) and the evidence of both Ordnance Survey maps and photographs (e.g. "Houses on Seana Bhaile" Geograph. Retrieved 10 August 2009) indicates a resident population. There is even a name, Seana Bhaile for the main settlement. However, neither the census nor the main reference work (Haswell-Smith 2004) refer to the island at all. Its small population is presumably included in nearby Grimsay (which has a population of over 800) by the census.
geohack.toolforge.org
This island is at (grid referenceNF860580) and the evidence of both Ordnance Survey maps and photographs (e.g. "Houses on Seana Bhaile" Geograph. Retrieved 10 August 2009) indicates a resident population. There is even a name, Seana Bhaile for the main settlement. However, neither the census nor the main reference work (Haswell-Smith 2004) refer to the island at all. Its small population is presumably included in nearby Grimsay (which has a population of over 800) by the census.
Ordnance Survey. OS Maps Online (Map). 1:25,000. Leisure. Retrieved 21 August 2013. The maps mark the height above sea level of a high point on most islands, but in a few cases this is not the highest peak.
The Corryvreckan is regularly cited as the third largest whirlpool of the world - see for example "Corryvreckan Whirlpool " Gazetteer for Scotland. Retrieved 19 September 2009. Some sources suggest it is the second largest after the Moskstraumen.