Sentence:  ... I found that her Christian name was Isabella, which they shortened into <WSD>Bell</WSD>, and that the name of the deceased non-commissioned officer was Tott. Being the kind of neat little woman it was natural to make a toy of—I never saw a woman so like a toy in my life—she had got the plaything name of Belltott. In short, she had no other name on the island. 
Meaning of the word marked with <WSD> tags:  (var=Belle); mostly used as a middle name in the 19th century.