depending on which source you look at, nambles were either the innards (liver,heart,lung,tripe) or the loin. In usage, it appears that usually the innards were meant,when it was nambles of hind, but loin when nambles of beef.

{the trivia one can find when browsing the web, or reading old college texts!)

might the "reamed awa'"/"wreathed awa'" line be :

reaved awa'??

MMario