Marginalia after Sebald
...
Arsanical Horror*[n. ahr-sen-ik-uhl hawr-er]Noun -
1. An unforeseen and inauspicious event related, perhaps, to chemicals.
2. Impossible to grasp completely. Incomprehensible.
"I understood it all now, yet I do not un der stand it."
3. See also: clairvoyant, deathbed, dust.
* From WG Sebald's Austerlitz