Although Lenney, his next opponent, appeared game and made a noble effort, he had little chance against Aaron, who dominated and won a decision in eleven rounds at Harpenden Common on 5 August 1823.

[3] In a rematch in November at Moulsey Hurst, the Bristol Mercury admitted that both boxers showed a great deal of "science" in their display, but that Aaron took most of the rounds and proved the better fighter.

In the first, Aaron caught Warren's head under his arm and hit him in the mouth, a move then known as "fibbing" and clearly illegal in today's boxing, governed by Marquess of Queensberry Rules.

London's Morning Chronicle wrote that "Barney has shown himself to be one of the best of his weight", though the reporter considered Warren to have the greater science and ring craft in his boxing.

Though Arron stood to profit from the £100 purse, Curtis was a threatening opponent, and though slightly shorter, he was an accomplished boxer, two years younger, and had easily defeated the skilled Peter Warren in four previous contests.

In the ninth round, only fifty minutes into the contest, Curtis floored Aaron with a blow that reflected "his whole force", on Barney's throat knocking him out and ending the match.

Aaron and his followers were referred to with disgust in a letter to the English newspaper the Liverpool Albion as "the lowest class of Jews in the east of London", and condemned for injuring the cause for which they marched.

Though he won by a large margin, receiving 6792 votes, Rothschild would not be allowed to serve in Commons without taking a vow as a Christian upon a New Testament, which as a Jew, he refused to do.

Both Rothschild and Disraeli believed the English government could form an alliance with the working classes of London, who at the time had limited social mobility, and lacked the right to vote.

Aligned with Aaron and his brethren, Rothschild hoped to bring Jewish emancipation into the broader platform of the civil and religious liberties promised by his Liberal party.

Disraeli was eventually successful in extending the vote to certain members of the English male working class in the Reform Act of 1867, the type of legislation that Aaron and his band may have marched for twenty years earlier.

Later he acted as an attendant in the English championship fight between Ben Caunt and Bendigo, the boxer William Thompson, in Suffolk in September, 1845, a long brutal bout where Barney was forced to hold back angry spectators in several rounds.