E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Red Snow
and Gory Dew. The latter is a slimy damp-like blood which appears on walls. Both are due to the presence of the algæ called by botanists Palmella cruenta and Hœmatococcus sanguineus, which are of the lowest forms of vegetable life.
