Sentence:  He and Gerald usually challenged the rollers in a sponson canoe when Gerald was there for the weekend; or, when Lansing came down, the two took long swims seaward or <WSD>cruised</WSD> about in Gerald's dory, clad in their swimming-suits; and Selwyn's youth became renewed in a manner almost ridiculous,nb.... 
Meaning of the word marked with <WSD> tags:  To sail about, especially for pleasure.