Allis entertainers

In searching newspapers for the family I came across a number of mentions in the Era of Mr Dave Allis and Miss Louie Cassatti - "clever comedy artists" around 1899 to 1900 or so. He also worked with Albert Juan as "knockabout artists"

Louie Cassati came from a Swiss singing family and specialised in Tyrolean singing and character vocals. The Cassati sisters are seen in the London Music Hall database in 1885, so Louie appears to have gone solo.
In 1897 one reviewer said that she "warbles a sentimental song acceptably" which is faint praise, though she did receive many good reviews for her singing. She was working all over the country and is seen from about 1888 until around 1900.

She had teamed up with Dave Allis between 1898 and 1900 and one review of their act said "Mr. Allis and Miss Louie Cassati are performers whose mission may be said to be various, and whose sundry devices prosper very well; and the comic sketch entitled “Whoa Emma” contains an abundance of those farcical incidents which are always found to be in favour".

Dave Allis continued after this and in a 1901 review "In the character of the Alderman Mr. Dave Allis is furnished with several chances to display his cleverness as an eccentric dancer..."
He appears to have continued until about 1902 when he disappears from the papers.

I haven't been able to find anything more about the backgrounds of these two and they do not appear to be in the 1901 census of England. Can anyone help?

Update April 2018: Dave Allis was apparently from Scotland according to a note in the "Era"

One more singer has been seen: From our Northumberland branch - Martha Caroline Allis (b1889) and in the 1911 census she was a professional singer though nothing more has been found in newspapers etc.

The first post (or hurdle)

The first post.
If anyone has an interest in the Allis (Alliss, Alles) etc. families in Britain and beyond then I would love to hear from you.

I have reconstructed some family trees on tribalpages which shows some separate family groups (covering most of England) and so far there is little to tie them together suggesting different origins. Therein lies a lot of work...