To me, the cat had a certain amount of charm.

Also, the cat came to the back door to meow even when my cat was still out there last time and she was resting on a chair. 

So he was also calling to say hello to a human. He would say hello and then run away. 

That type of meow, that I only heard in the backyard, was very distinctive, very different from my cat's meow. There was a trill to it.