Sentence:  He had his tea and hot rolls in a morning, while we were battening upon our quarter-of-a-penny loaf — our "crug" — moistened with attenuated small beer, in wooden piggings, smacking of the pitched leathern <WSD>jack</WSD> it was poured from. 
Meaning of the word marked with <WSD> tags:  A pitcher or can of waxed leather, supposed to resemble a jackboot; a black-jack.