[II.88] For 'from' without a verb of motion see Abbott, § 158.
[II.89] 'Main' is often found in sixteenth century literature in the sense of 'great,' 'strong,' 'mighty.' Cæsar was, in his philosophy, an Epicurean, like most of the educated Romans of the time. Hence he was, in opinion, strongly skeptical about dreams and ceremonial auguries. But his conduct, especially in his later years, was characterized by many gross instances of superstitious practice.
[II.90] apparent prodigies: evident portents. 'Apparent' in this sense of 'plainly manifest,' and so 'undeniable,' is found more than once in Shakespeare. Cf. King John, IV, ii, 93; Richard II, I, i, 13.
[II.91] So in Spenser, The Faerie Queene, II, v, 10:
Like as a Lyon, whose imperiall powre
A prowd rebellious Unicorn defyes,
T' avoide the rash assault and wrathful stowre
Of his fiers foe, him to a tree applyes,
And when him ronning in full course he spyes,
He slips aside; the whiles that furious beast