His collecting propensities made him useful to John Ray and Robert Boyle.
As a commercial product spider-silk has been found to be equal, if not superior, to the best silk spun by lepidopterous larvae; but the cannibalistic propensities of spiders, making it impossible to keep more than one in a single receptacle, coupled with the difficulty of getting them to spin freely in a confined space, have hitherto prevented the silk being used on any extensive scale for textile fabrics.
So long as he lived he was a check upon the worst propensities of the king's administration.
But he does not seriously trouble himself to argue with egoism, or to weigh carefully the amount of happiness that might be generally attained by the satisfaction of egoistic propensities duly regulated; a supreme unquestioning self-devotion, in which all personal calculations are suppressed, is an essential feature of his moral ideal.
The Ghegs especially, notwithstanding their fierce and lawless character, their superstition, ignorance and predatory propensities, possess some noteworthy qualities rarely found in eastern Europe: simple, brave, faithful, and sometimes capable of devoted attachment, these wild mountaineers make excellent soldiers and trustworthy retainers; they have long furnished a bodyguard to the sultan and, like the Tosks, are much employed as kavasses and attendants at foreign embassies and consulates in the East.