[W. G. Sebald's The Rings of Saturn, translated by Michael Hulse, 1998]
those who go in pursuit of herring have always relied on their traditional knowledge, which draws upon legend, and is based on their own observation of facts such as the tendency of the fish, swimming in even, wedge-shaped formations, to reflect a pulsating glow skyward when the sunlight falls at a particular angle. One dependable sign that herring present is said to be myriads of scales floating on the surface of the water, shimmering like tiny silver tiles by day and sometimes at dusk resembling ashes or snow. . . .
An idiosyncrasy peculiar to the herring is that, when dead, it begins to glow; this property, which resembles phosphorescence and is yet altogether different, peaks a few days after death and then ebbs away as the fish decays. For a long time no one could account for this glowing of the lifeless herring, and indeed I believe that it still remains unexplained. Around 1870, when projects for the total illumination of our cities were everywhere afoot, two English scientists with the apt names of Herrington and Lightbown investigated the unusual phenomenon in the hope that the luminous substance exuded by dead herrings would lead to a formula for an organic source of light that had the capacity to regenerate itself. The failure of this artificial light, constituted no more than a negligible setback in the relentless conquest of darkness. . . .
I wonder now whether inner coldness and desolation may not be the pre-condition for making the world believe, by a kind of fraudulent showmanship, that one's own wretched heart is still aglow.
The Rings of Saturn