1858 map of North Frisian islands, including Hainshallig
Hainshallig (also spelled Hayenshallig) was a small Hallig in the North Frisian Wadden Sea, located east of the Hallig of Hooge, that was flooded and sank in 1860. At the time, Hainshallig was leased to a Hooge resident as part of a leasehold estate and was used for the production of hay. A levee may have once led from Hooge to Hainshallig. The area belonged to the Duchy of Schleswig, which was a fiefdom of the Danish crown, now Germany.
- ^ Röhr, Hanswerner. "Die Halligen an der Westküste gelten vorerst als sicher" (PDF). Berichte und Geschichte aus Husum und Umgebung (in German).
- ^ Ersch, Johann Samuel (1833). Allgemeine Encyclopädie der Wissenschaften und Künste in alphabetischer Folge (in German).
- ^ Hanssen, Georg (1884). Agrarhistorische Abhandlungen 2.
Coordinates: 54°34′24″N 8°36′31″E / 54.573355°N 8.608475°E