More precisely, they may be considered as two groups, one of which, including Teneriffe, Grand Canary, Palma, Hierro and Gomera, consists of mountain peaks, isolated and rising directly from an ocean of great depth; while the other, comprising Lanzarote, Fuerteventura and six uninhabited islets, is based, on a single submarine plateau, of far less depth.
Jutland showed an average of only 109 inhabitants per square mile, whilst on the islands, which had a total population of 1,385,537, the average stood at 272.95, owing, on the one hand, to the fact that large tracts in the interior of Jutland are almost uninhabited, and on the other to the fact that the capital of the country, with its proportionately large population, is situated on the island of Zealand.
It is said to have been attacked and devastated by the Javanese in 1252, and at the time when it passed by treaty to the East India Company in 1819, Sir Stamford Raffles persuading the sultan and tumenggong of Johor to cede it to him, it was wholly uninhabited save by a few fisherfolk living along its shores.
The site, now uninhabited, is marked by ruins - the substructions of an amphitheatre, parts of a great temple - which have furnished interesting inscriptions.
The country was roadless and uninhabited save by wild beasts, and fever and cholera made sad havoc of the working parties; but it was successfully accomplished.