Thorgisl's Saga in Origines Islandicae (as above).

Viking Club. Caithness and Sutherland Records.} London
Viking Club. Old Lore Miscellany. } 29 Ashburnham
Viking Society. Saga Books, &c. } Mansions, Chelsea

William the Wanderer, by W.G. Collingwood. G.C. Brown Langham & Co.,
47 Great Russell Street, London, W.C., 1904.

Worsaae. Danes and Norwegians. London, John Murray, 1852.

Worsaae. The Prehistory of the North. London, Trübner, 1886.

Wyntoun's Chronicle. Edinburgh, Edmonston & Douglas, 1872.

[Footnote 1: An excellent Bibliography of Caithness, by Mr. John
Mowat, was published by W. Rae, Wick, in 1909, and of Caithness and
Sutherland by The Viking Club, 1910, by the same author.]

[Footnote 2: The Capitals and abbreviations placed in brackets after
certain authorities, give their initial letters and short titles,
(e.g. (O.S.) Orkneyinga Saga), as used in the notes at the end of this
volume.]

Early Sources of Scottish History, A.D. 500 to 1286, by Alan O.
Anderson. Oliver & Boyd, Edinburgh.

NOTE.--Since this little book was printed, the above great work
has appeared. To the student of the Norse invasions its value is
inestimable.