Question

why did Horace danbey fell sure of his success in that year's robbery ?​

Answer 1

Answer:

because all the place of the house even that the safe was hidden behind a portrait was given. it had made his robbery easy by this advantage but this did not go according to his plan in the end.

Answer 2

He felt sure that the robbery would go well since he had made a good study go the house, the burglar alarm, the dog, the workers in the house, the safe, etc. He saw the people in the house going to the movies and keeping the keys next to the kitchen window.
Knowing the location of the key, he thought that the robbery would be a successful one