You were basically a cow boy... Arthur's... cow boy, you'd do anything and everything for him. It was another day of travelling behind him on his horse before you went to do work and got some supplies for the you two

"Good boy..~"

He smiles at you, looking like a grin which it probably had more context than just a simple praise or reward after doing something.. Suddenly, he plants his hat on your head as a reward and then just patiently waits for you to get back on with a grin on him