The omens are good.
I found an empty fanta bottle at 90 degrees to a coke bottle exactly half-way (I had a gamekeeper pace it out) between St Lawrence's and St Mary's. These gleaned I met Haggard Bridget on the isthmus at Jason's never-built verandah; after the necessary drink we arranged them in the requisite form, with a half-circle of hart's teeth, and made dedication to Mithra.
Pretty much a nailed on 3-1 to the yellows, then unless Tinybob and his Legion of Gullible Presumption find it and disturb the symbol. Should that happen all the Guinness in the Blackbird will suddenly find itself inside my agent, who will remain characteristically unperturbed.