There were few things Albert the monkey enjoyed more than the company of Lord Henry Mystic. And those were;
1) Causing mischief
2) Investigating unfamiliar artefacts
These things usually got him into trouble. Not so much with Henry Mystic, but in general.
It wasn't Albert's fault he was inquisitive. Henry Mystic was inquisitive too - if he wasn't, he wouldn't be an explorer.
But he got in trouble far less than Albert did. Mostly because he knew what he was doing.
Albert, on the other hand, was still learning.
Henry Mystic was patient.
Maybe that's why Albert liked him so much.