Espagnole sauce (note the spelling) is commonly known as brown sauce in English.

See this link: http://en.wikipedia.org/wiki/Espagnole_sauce#Preparation

If you are referring to the Five Mother Sauces, then, brown stock can be made into Espagnole sauce, by adding roasted mirepoix (onions, carrots, and celery), as well as a rich brown stock, and a dark roux... Tomato can also be added, if desired. Once you have made the Mother Sauce, there are many derivatives that can be made, such as: Demi-Glace (a reduction of Espagnole, that is much more flavorful), you can add Mushrooms, and Sauce Diable (which is the Demi-Glace, with chiles, tarragon vinegar, and shallots added)... You can pretty much add any of your favorite ingredients to the Espagnole, to create your own sauces.

All i know is one's pasta sauce

L'heure espagnole was created in 1911.