I like the idea of adding a word to distinguish similarly named streets. How about 'Old' New Street, 'Very' New Street, 'Luscious' Cherry Street, 'Big' Cannon Street, 'Little' Cannon Street, 'Steep' Hill Street, 'Lower' High Street, 'Busy' High Street ..... OK I'll stop there! But come on town planners, we could be a bit more imaginative and as the 1863 article suggests, streets would "sound more musical".
The anti-slavery bazaar would most likely be addressed primarily to women. I have an ancestor who was a patron of Industrial Schools (not B'ham, but Liverpool) and the adverts I've seen of those are aimed at women who have time (and money) on their hands.
Viv.