Yet Cesare has been charged with his death, and accused of having poisoned him, and, amidst the host of silly, baseless accusations levelled against Cesare, you shall find none more silly or baseless than this.

In other instances of unproven crimes with which he has been charged there may be some vestiges of matter that may do duty for evidence or be construed into motives; here there is none that will serve one purpose or the other, and the appalling and rabid unscrupulousness, the relentless malice of Borgian chroniclers is in nothing so completely apparent as in this accusation.
Sanuto mentions the advices received, and the rumours which say that Cesare murdered him through jealousy, knowing him beloved by the Pope, seeing him a legate, and fearing that he might come to be given the governorship of some Romagna fief.
When Gandia died and Cesare was accused of having murdered him, the motive advanced was that Cesare, a papal legate, resented a brother who was a duke.

Now, Cesare, being a duke, resents a cousin's being a papal legate.

You will observe that, if this method of discovering motives is pursued a little further, there is no man who died in Cesare's life-time whom Cesare could not be shown to have had motives for murdering.
Sillier even than Sanuto's is the motive with which Giovio attempts to bolster up the accusation which he reports: "He [Cesare] poisoned him because he [Giovanni] favoured the Duke of Gandia." That, apparently, was the best that Giovio could think of.

It is hardly intelligible--which is perhaps inevitable, for it is not easy to be intelligible when you don't quite know, yourself, what you mean, which must have been Giovio's case.
The whole charge is so utterly foolish, stupid, and malicious that it would scarcely be worth mentioning, were it not that so many modern writers have included this among the Borgia crimes.