Which preposition to use with gotland

on Occurrences 1%

In order to get to Haethum, he left Gotland on the right, and soon afterwards Zeeland likewise, together with the other islands which had been the habitation of the Angles before they went to England, while those which belonged to Denmark were on his left for two days.

to Occurrences 1%

E. This is certainly true during the latter part of his voyage, after turning round the south end of Sweden, and standing again to the northward, between Zealand and Fyen; but in coasting down the shore of Sweden to the south, he must have left Gotland to the left,E. SECTION IV.

Which preposition to use with  gotland