To return to the senate; a bill was now passed that a loan of 47 sixty million sesterces should be raised from private individuals and administered by Pompeius Silvanus. This may have been a financial necessity, or they may have wanted it to seem so. At any rate the necessity soon ceased to exist, or else they gave up the pretence. Domitian then carried a proposal that the consulships conferred by Vitellius should be cancelled, and that a state funeral should be held in honour of Flavius Sabinus.[360] Both proposals are striking evidence of the fickleness of human fortune, which so often makes the first last and the last first. It was about this time that Lucius Piso,[361] the pro-consul of 48 Africa, was killed. To give a true explanation of this murder we must go back and take a brief survey of certain matters which are closely connected with the reasons for such crimes. Under the sainted Augustus and Tiberius the pro-consul of Africa had in his command one legion and some auxiliaries with which to guard the frontier of the empire.[362] Caligula, who was restless by nature and harboured suspicions of the then pro-consul, Marcus Silanus, withdrew the legion from his command and put it under a legate whom he sent out for the purpose. As each had an equal amount of patronage and their functions overlapped, Caligula thus caused a state of friction which was further aggravated by regrettable quarrels. The greater permanence of his tenure[363] gradually strengthened the legate's position, and perhaps an inferior is always anxious to vie with his betters. The most eminent governors, on the other hand, were more careful of their comfort than of their authority.