This section is from the book "The Post-Graduate Cookery Book", by Adolphe Meyer. Also available from Amazon: The Post-Graduate Cookery Book.
I. Reduce 1/2 gill of white wine vinegar with 1 dozen pepper corns; when nearly dry, take the pan from the fire, add 6 raw egg yolks and 2 tablespoonfuls of cold water. Set the saucepan in the bain-marie with boiling water, or on the range; work the contents of the pan incessantly, adding by degrees 8 ounces of butter; strain, season to taste, and before serving, the juice of half a lemon may be added.
2. Prepare the same reduction as stated above; add I gill of Bechamel sauce. When boiling, add 4 egg yolks; cook these without allowing them to boil, and add, by degrees, 8 ounces of butter. Season to taste and strain; add lemon juice before serving.
Note. - Sauce No. 2 is in no sense inferior to No. 1; it is equally as good in every respect, and easier to handle.
Add 3 gills of well reduced tomato sauce to 1 quart of Dutch Sauce.
Sauce Hollandaise Verte - Green Dutch Sauce. Use one-third of Venetian butter.
Follow directions as given for Dutch Sauce, adding 3 gills of whipped cream to each quart of sauce.
Sauce Maltaise ou Sauce Hollandaise a l'Orange -Maltese, or Dutch Sauce with Orange Flavor.
Prepare a Dutch Sauce according to one of the two receipts given. Before straining, scrape the outer rind of 1 orange and add it to the sauce.
Sauce Flamande - Flemish Sauce. Add some French mustard to Dutch Sauce.
Put in a saucepan 3 finely chopped shallots, 6 pepper corns. I bay leaf and a very small sprig of thyme; moisten with 1/2 gill of white wine vinegar and allow to reduce nearly dry; add I tablespoonful of Bechamel sauce and 3 raw egg yolks, and set the pan in the bain-marie with boiling water, stirring continuously with a wooden spoon or whip. When sufficiently con-sistent - i. e., when the yolks have been cooked (without boiling) - add three ounces of soft butter, stirring all the time. Season with salt, a small pinch of cayenne pepper (and if necessary a little lemon juice), strain through an etamine cloth into another saucepan, and add I teaspoonful each of chopped tarragon and chervil.
Note. - This sauce can be prepared without Bechamel sauce, or, if economy is the object, the quantity of Bechamel may be increased.
Proceed as for the ordinary Bearnaise Sauce, using 1 ounce of Venetian butter to every 2 ounces of sweet butter.
Add 3 gills of well reduced tomato sauce to each quart of Bearnaise Sauce.
Put I tablespoonful of finely prepared chopped mint and I gill of white wine into saucepan, allow to reduce quite dry, add I tablespoonful of Bechamel sauce and 3 egg yolks, and finish to cook with 3 ounces of butter (the same as Bearnaise Sauce). When done, add I tablespoonful of meat extract.
Same as Bearnaise Sauce, with the addition of 2 tablespoonfuls of beef extract to 1 gill of sauce. Its appearance should be of a blond tint.
Add to I pint of Red Bearnaise Sauce I teaspoonful each of chopped truffles, gherkins and mushrooms.
Add 2 gills of fresh and finely grated horseradish to I quart of Bearnaise Sauce.
 
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