I’ve selected this batch to group based on them being people of the theater or in theatrical performances of some kind. I excluded the circus freaks even though many of them were theatrical as well (Tom Thumb was a comic actor as well as a star of Barnum’s circus). I’m grouping the cross-dressed women in this because it may well have been a theatrical role they were playing, like Sallie Holman as Ike Partington. There are also acrobats in this grouping, as many of them performed in vaudeville halls as well as in circuses, so they count as theatricals in a way.
Take a look at the two violinists in the fifth row – I’m wondering if they aren’t in fact two pictures of the same duo, at different times.