Re: Bing Knows
'what a “cup” is when measuring ingredients.'
In AU its standardized metric cup at 250ml. I think Elizabeth David in one of her books stated that it was 200ml in the UK but no mls in the US ;)
Apparently 1 Imperial cup = 10 fl. oz, (Imperial ) or 1 US cup = 8 fl. oz. (US)
The pre metric Canadian cup = 8 fl. oz. (Imperial) which is a tad over 200ml so ED might have been thinking of Canada.
The most sensible observation was that a cup was taken as 1/2 pint which explains the Imperial/US difference.
I don't recall whether it was ED or Constance Spry/Rosemary Hume that habitually refered to gills of liquid and sticks of butter which in pre internet times required a little sleuthing. 1 gill = 1/4 pint (1/2 cup - here we go again :), 1 stick is 1/2 cup of butter ( 8 oz. wt, about 100g.)
Fortunately cooking requires taste (both senses), discretion and a firkin of common sense especially when interpreting old recipes.