But of lower consideration is the common foretelling of strangers, from the fungous parcels about the weeks of Candles: which only signifieth a moist and pluvious ayre about them, hindering the avolation of the light and favillous particles; whereupon they are forced to settle upon the snast.
Source: wiktionary
The rocks and stones generally upon the hills, are extremely ragged and favillous, vast bodies of them, in many instances, having the appearance of being composed entirely of the calcarious matter once held in solution by the hot water of the springs.
Source: wiktionary
The great noises, united in one continuous roar all the evening and through the night to Thursday morning, with the black rain, falling dust, and favillous scoriae, and with the midnight darkness all Wednesday, created feelings of fear and anxious suspense.
Source: wiktionary