One of his later undertakings was a description of Southern Russia, a physical and topographical account of the province of Taurius—a work which, originally published in French, was afterwards translated into English and German.

Delighted with this country, which he had visited in 1793-94, he desired to settle there. The empress bestowed some of the crown lands upon him, and he transported his family to Simpheropol.

Pallas profited by the opportunity to undertake a new journey in the northern provinces of the empire, the Steppes of the Volga, and the countries which border the Caspian Sea as far as the Caucasus. He then explored the Crimea. He had seen parts of the country twenty years before, and he now found great changes. Although he complains of the devastation of the forests, he commends the increase of agricultural districts, and the centres of industries which had been created. The Crimea is known to be considerably improved since that time—it is impossible to foresee what it may yet become.

Enthusiastic though he was at first in his admiration of this province, Pallas was exposed to every kind of treachery on the part of the Tartars. His wife died in the Crimea; and finally, disgusted with the country and its inhabitants, he returned to Breton to end his days. He died there on the 8th of September, 1811.

He left two important works, from which naturalists, geographers, statesmen, and merchants, were able to gather much trustworthy information upon countries then but little known, and the commodities and resources of which were destined to have a large influence over European markets.