Answer :
Horace Danby was a meticulous planner, but still he faltered. He used to plan his
robberies very well. He knew all the details of the Shotover Grange. He knew the time
when there would be no one at the house. He even knew the name of the dog in the
house. However, he was completely deceived by the lady he met at the house. He was
outdone by her. He was taken in by her subtle ways, and did not realize that she herself
could have been a thief. On seeing her, he got scared and started begging her to let him
go. When she asked him to take out the jewels for her, he readily agreed. He did not
feel any oddity in her leaving him, and not getting him arrested. He was only too happy and thankful that he could go. In his hurry, he even overlooked the fact that his
fingerprints were left all over the safe. He blindly believed the lady, and thus, in spite of
his meticulous planning, he faltered.