Both here and in Babylonia he re-established the imperial authority, and in 205 undertook a voyage from the mouth of the Tigris, through the Arabian gulf to the flourishing mercantile town of Gerrha in Arabia (now Bahrein) (Polyb.
They promised an easy expiation for crimes to both living and dead on payment of a fee, undertook to punish the enemies of their clients, and held out to them the prospect of perpetual banqueting and drinking-bouts in Paradise.
In 1738 John Elton traded between Astrakhan and the Persian port of Enzeli on the Caspian, and undertook to build a fleet for Nadir Shah.
It was still being held in strict subjection by the latter when, towards the end of the i ith century, Hildebrand (Gregory VII.) undertook its enfranchisement and began the war of the investitures (q.v.), from which the papacy was to issue with such an extraordinary renewal of its vitality.
Here Leonardo undertook to paint an altar-piece for the Church of the Annunziata, Filippino Lippi, who had already received the commission, courteously retiring from it in his favour.
The chief feature in the new venture at first consisted of the analysis of the journals, which Cave undertook personally.
In anything which he undertook he always wanted to carry his point almost regardless of incidental effects on himself or others.
In 1870 the Greek Archaeological Society undertook a series of excavations in the Outer Ceramicus, which had already been partially explored by various scholars.
The sovereign undertook to consult the knights before embarking on a war, all disputes between the knights were to be settled by the order, at each chapter the deeds of each knight were held in review, and punishments and admonitions were dealt out to offenders; to this the sovereign was expressly subject.
This explanation is incomplete, as it leaves out of account the action of the polarizer and analyser, and it was with the purpose of removing this defect that Fresnel and Arago undertook the investigations mentioned above and thus supplied what was wanting in Young's explanation.