Speaking of Words: An Article on Articles

But we are sometimes strangely inconsistent in English about where we deploy the.  We use it of rivers (the Mississippi, the Merrimack) but not of lakes, we use it of groups of islands (the Azores, the Isles of Shoals) but not of individual islands, and we use it of mountain ranges (the Andes, the White Mountains) but not of individual mountains, unless they are in Switzerland (the Matterhorn, the Jungfrau).