Clarity,
Office 17622,
PO Box 6945,
London.
W1A 6US
United Kingdom
Phone/ Voicemail:
+44 (0)20 3287 3053 (UK)
+1 (561) 459-4758 (US).
The main point, and maybe the only point, of a ritual here is to train yourself in respect for the divination process, which hopefully leads to taking more care with your question and paying better attention to the Yi's response. If it doesn't do that then it's useless.
Before I learned of the probability problems with the "modern" yarrow method, i used to use stalks. I harvested and lacquered them myself, kept them wrapped in a silk scarf above eye level, with my three favorite texts. This should probably be enough of a ritual.
References do abound here, but none comprehensive or succinct. My own books are free to download at the link below and I talk about in Volume One, pp 46-47 (56-57 0f the PDF). Since I wrote that I've become even more suspicious that the Yarrow method we now use dates only from the 12th century and is not the method of ancient times.
Clarity,
Office 17622,
PO Box 6945,
London.
W1A 6US
United Kingdom
Phone/ Voicemail:
+44 (0)20 3287 3053 (UK)
+1 (561) 459-4758 (US).