In this new material one mystic formula, or rather pair of formulae, recurred so often that Willett had it by heart before he had half finished his quest. It consisted of two parallel columns, the left-hand one surmounted by the archaic symbol called “Dragon’s Head” and used in almanacs to indicate the ascending node, and the right-hand one headed by the corresponding sign of “Dragon’s Tail” or descending node. The appearance of the whole was something like this, and almost unconsciously the doctor realized that the second half was no more than the first written syllabically backward with the exception of the final monosyllables and of the odd name Yog-Sothoth , which he had come to recognize under various spellings from other things he had seen in connection with this horrible matter. The formulae were as follows⁠— exactly so, as Willett is abundantly able to testify⁠—and the first one struck an odd note of uncomfortable latent memory in his brain, which he recognized later when reviewing the events of that horrible Good Friday of the previous year.