Gustavius Boles

Dr Gustavius Boles is a fictional character from the book 93 Million Miles in a Balloon.

Appearance
Dr Gustavius Boles is a yellow anthropomorphized dog with a small ginger moustache, a brown jacket, brown flying goggles, a black bobble hat, and a white ascot.

Personality
Dr Boles seems to like to keep an air of mystery to him, and as such he dislikes inquisitive people, which he calls "questioners". He is also shown to be very skilled in his balloon.