Emerson and Baldwin
Emerson and Baldwin appeared at the Pavilion Theatre in Newcastle in 1909 as this article from the Newcastle Weekly Journal & Courant, 30 January 1909 shows:
Not only are they considered “clever comedians” but they performed “some wonderfully smart and unique juggling feats”.
There’s some good biography of Eddie Emerson with some description of his act and relationship with Jerry Baldwin in this miracle factory article. It’s not explicit, but it appears that they’re Americans – so their appearances in North East England are obviously part of trips abroad.
It seems that they were no strangers to travel – while there are internet resources that show them in the USA in New York in 1907 (The Evening Telegram article, 16 February 1907), 1912 (New York Times article, 29 December 1912) and 1913 (New York Times, 8 April 1913), they also show up in Perth, Australia in 1912 as this article in The Western Australian from 12 April shows.
After all of that they were back in the UK, at Sunderland Empire on 21 July 1913: