Sentence:  What are the sinews and souls of Russian serfs and Republican slaves but Fast-Fish, whereof possession is the whole of the law? What to the rapacious landlord is the <WSD>widow's</WSD> last <WSD>mite</WSD> but a Fast-Fish? 
Meaning of the word marked with <WSD> tags:  A very small gift or donation which, however, represents a great sacrifice on the part of the giver.