Bulmer:

an official who left Henry VI'I’s service forBuckingham's and thus brought down Henry's wrathon both of them)原来是向我效忠的仆人，公爵却把他夺去据为己有。
Phrases:
sworn brother: brother in arms with whom one hasexchanged vows to share each other's fortune; closecompanion中古骑士之间的结拜兄弟，亲密伙伴。
△Ado.1.1.73(71): “Who is his companion now? he hath everymonth a new sworn brother.”现在和他做伴的是谁？ 他每个月都要有一个新结拜的盟兄弟。
sworn brothers: companions-in-arms who took anoath according to the rules of chivalry to share eachother's good and bad fortunes,faithful comrades:brotherhood of thieves（按照骑士规则）宣誓结成的战友，忠实伙伴；（又解）盗贼的兄弟伙。
△H.V.2.1.12(11):“I willbestow a breakfast to make you friends,and we'll beall three sworn brothers to France.”我愿意请二位一顿早餐，让你们和好，然后咱们结成铁哥们儿一起到法兰西去。