Source: "A systematic handbook of practical brewing", by E.R. Southby, 1885, page 24.
I also found this about ageing and storing beer:
"The methods of storing beer in different parts of the United Kingdom vary considerably. In Burton the beer is run into the trade casks, and these are often stacked in the open during the winter months, and only placed under cover as the season advances. In other localities the trade casks full of stock beer are stored in underground cellars, where a very uniform temperature is maintained. Of these two plans, the former answers well if the beer is sound and good enough to stand it, but if there is any doubt on this point the latter plan must of course be adopted. Then again, black beers and old ales are frequently stored in vats, and vatting greatly improves the quality of these varieties of malt liquor." (Source: "A systematic handbook of practical brewing", by E.R. Southby, 1885, page 143.)
That's it for today. Though there's more to come from Southby. If you can stay awake.