I also failed to give credit to the author of the recipe: John Ash. It comes from his cookbook From Earth To Table. In the cookbook, he goes on to give a recipe for making your own "high-quality" curry powder. It is as follows. Preheat oven to 375. Put 1 oz each seeds of coriander, cumin,fenugreek, poppy, 1 cinnamon stick broken into small pieces and cardamom on a baking sheet. (You can add 1/2 oz of dried red chiles if you want some heat.) Toast for 3 to 4 minutes or until the spices are fragrant. Cool and then grind them. Transfer to a small container and add 1/2 oz ground ginger and 1 oz of ground tumeric.
I apologize for any inconvenience my omission may have caused.