Sentence:  <!--In going from La Nore to the mouth of the Sorel, we passed by Brown's battery (as it is called), although it never had a cannon mounted on it. [...]--> His grand <WSD>battery</WSD> was as badly provided with cannon as his little <WSD>battery</WSD>, for not a single gun was mounted on either. 
Meaning of the word marked with <WSD> tags:  An elevated platform on which cannon could be placed.