Sentence:  If therefore the premises in this case had been sold before they were partially destroyed by fire, the widow would have been <WSD>endowable</WSD> in the entire sum that they would have sold for, which in this case it is fair to presume would have been $957.50, the total sum received from the sale and insurance. 
Meaning of the word marked with <WSD> tags:  Entitled to receive or eligible for dower; dowable.