The island of Alonissos has been the least populated of the Northern Sporades. Yet, she has kept a rather unspoiled environment. Here is a photograph of unknown date and provenance
Small passenger ships connecting all the way to Piraeus started serving the island as early as 1900. Here is an interesting ad from July 20, 1929 advertising the steamship Panagia doing the run Piraeus, Karystos, Kyme, Skyros, Skiathos, Skopelos, Glossa, Alonissos. The inclusion of Glossa (the NW port of Skopelos surprised me as I had never heard such a connection). In the late 1920s, Glossa had 1283 inhabitants, Alonissos 779 (from Eleutheroudakis' Encyclopedia of 1930)
Alonnisos 072029.jpg
Alonissos.jpg