Sentence:  In this distribution, care is taken to leave not only those which bear the owner's mark and brand, but his due proportion of the <WSD>mavericks</WSD> that have been found upon the expedition. ["footnote": The term "maverick" is applied in this country to all animals that have neither mark nor brand upon them, and originated in this way:nb...] 
Meaning of the word marked with <WSD> tags:  An unbranded range animal. (from 1860s)