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Oysters for Invalids
Oysters being nourishing and easily digested are, when in season, often ordered for invalids. However, they do not always tempt the sick person in their simply unshelled garb. Make half a pint of good beef-tea, thicken with a little arrowroot to the consistency of thin cream. When it boils, take it off the fire, and let it get almost cold, then put half a dozen oysters in it. Let all heat very slowly but thoroughly. Do not let it boil. By avoiding this the oysters will remain quite mellow and tender, and as digestible as if eaten uncooked. Boiling hardens them.
OYSTERS, FOWL WITH. (See FOWL, WITH OYSTERS; also OYSTERS, POULETS AND.)
This is a sickroom dish built on a deliberate instruction not to cook the oysters through, served to the people least able to tolerate that risk. The notes below explain the units and the thinking, not a way to reproduce it.
- Why it failsThe whole point of the method is that the oysters are held below boiling so they stay "as digestible as if eaten uncooked." Broth cooling to "almost cold" and then warmed slowly will sit in the range where Vibrio species and norovirus survive comfortably; nothing here brings the shellfish to a temperature that kills them.
- Who it was forIt is addressed to invalids — precisely the group (liver disease, diabetes, cancer treatment, immune suppression, pregnancy, the very old) for whom raw and lightly warmed oysters carry the highest risk of severe illness. If someone unwell needs feeding, use a current recipe for a fully cooked broth.
- The oysters themselvesOysters came live from the beds and were sold and eaten fresh, though barrelled oysters also travelled inland over several days. "When in season" meant the cold months; the old rule about avoiding oysters in months without an R is traditional, and is usually explained by warm-weather spoilage and by spawning condition.
- Half a pintIn this English book, half a pint is 10 fluid ounces, about 285 ml — a single invalid's cupful, not a family portion. Half a dozen oysters in that volume is a light meal by design.
- Beef-teaNot stock in the modern sense. Beef-tea was lean beef, finely chopped, steeped and gently drawn in water without browning, then strained — a pale, near-clear liquid valued as a restorative. It carries very little nutrition for the effort, as later analysis showed.
- ArrowrootStill sold, and still behaves the same way: it thickens at a lower temperature than flour, gives a clear rather than cloudy body, and thins out if held at a boil. It was the usual sickroom thickener, valued for being bland and reputedly easy to digest.
Invalid cookery was a recognised branch of the household art, with its own chapters in many Victorian manuals. Beef-tea, arrowroot, gruel, calf's-foot jelly and lightly treated oysters formed a standard sickroom repertoire, chosen for being bland, pale, easily swallowed and — in the medical thinking of the day — "easily digested," a phrase that carried far more weight then than nutritional content did. Oysters earned their place because they were cheap and abundant in Britain through much of the century, sold by the barrel and eaten by the poor as readily as the rich, and because they needed almost no chewing. The author's insistence that boiling hardens them is sound observation: oyster muscle contracts and toughens quickly with heat, which is why modern cooks add them at the very end of a stew. The nursing advice that follows from it, however, belongs to a period before shellfish were connected with typhoid or Vibrio.