Sentence:  The best anchorage in summer for small vessels, gun-brigs, &c. will be found, West point of Berlinga island bearing W. b. N. East point N.N.E. 1/2 E. and the Old Fort on the inner point of the small Sandy bay N. 3/4 W. where you will have eleven fathoms sandy bottom, and good holding ground at tabout three cables length from the shore, which will be of  little consequence, inasmuch as the wind generally sets in from the north, and gives good warning ere it <WSD>southers</WSD>. 
Meaning of the word marked with <WSD> tags:  To move toward the south.