Read it through once

“Yes, I did it. I don't know why. I just took the notion, and carried it out without stopping to think. It was wrong. It could have done harm. I was always sorry about it afterward. You must forgive me. I was Mr. Bascom's guest on his yacht, on his voyage around the world. He often spoke of you, and of the pleasant times you had had together in his home; and the notion took me, there in Melbourne, and I imitated his hand, and wrote the letter.”