[II.119] This speech, and that beginning with l. 291, follow Plutarch very closely: "His wife Porcia[1] ... was the daughter of Cato, whom Brutus married being his cousin, not a maiden, but a young widow after the death of her first husband Bibulus, by whom she had also a young son called Bibulus, who afterwards wrote a book of the acts and gests of Brutus .... This young lady, being excellently well seen[2] in philosophy, loving her husband well, and being of a noble courage, as she was also wise: because she would not ask her husband what he ailed before she had made some proof by her self: she took a little razor, such as barbers occupy to pare men's nails, and, causing her maids and women to go out of her chamber, gave herself a great gash withal in her thigh, that she was straight all of a gore blood: and incontinently after a vehement fever took her, by reason of the pain of her wound. Then perceiving her husband was marvellously out of quiet, and that he could take no rest, even in her greatest pain of all she spake in this sort unto him: 'I being, O Brutus,' said she, 'the daughter of Cato, was married unto thee; not to be thy bed-fellow and companion in bed and at board only, like a harlot, but to be partaker also with thee of thy good and evil fortune. Now for thyself, I can find no cause of fault in thee touching our match: but for my part, how may I shew my duty towards thee and how much I would do for thy sake; if I cannot constantly bear a secret mischance or grief with thee, which requireth secrecy and fidelity? I confess that a woman's wit commonly is too weak to keep a secret safely: but yet, Brutus, good education, and the company of virtuous men, have some power to reform the defect of nature. And for my self, I have this benefit moreover, that I am the daughter of Cato, and wife of Brutus. This notwithstanding, I did not trust to any of these things before, until that now I have found by experience, that no pain or grief whatsoever can overcome me.' With those words she shewed him her wound on her thigh, and told him what she had done to prove herself. Brutus was amazed to hear what she said unto him, and lifting up his hands to heaven, he besought the gods to give him the grace he might bring his enterprise to so good pass, that he might be found a husband, worthy of so noble a wife as Porcia: so he then did comfort her the best he could."—Marcus Brutus.
[II.119[1] the correct classical spelling.
[II.119[2] i.e. versed.
[II.120] the | tho F1.
[II.121] ll. 285-286: In the outskirts or borders, and not at the center or near the heart. The image is exceedingly apposite and expressive.
[II.122] This embodies what was known about the circulation of the blood at the close of the sixteenth century. In 1616, the year of Shakespeare's death, William Harvey, born in 1578, lectured on his great discovery, but his celebrated treatise was not published until 1628. The general fact of the circulation was known in ancient times, and Harvey's discovery lay in ascertaining the modus operandi of it, and in reducing it to matter of strict science.
[II.123] Cf. The Merchant of Venice, I, 1, 166:
Her name is Portia, nothing undervalued
To Cato's daughter, Brutus' Portia.
[II.124] [Knocking within] Malone | Knocke F1F2.