Final answer:
We cannot determine the attitude of Williams toward Leopold without the specific text in question, as it is not referenced in the provided excerpts.
Step-by-step explanation:
The attitude of Williams toward Leopold at the start of the letter is not explicitly detailed in any of the provided excerpts. To ascertain Williams's attitude toward Leopold, it would be essential to have the specific text in question. If the letter mentioned is among the provided excerpts, we do not have any direct references to a person named Williams or Leopold to establish a clear understanding of Williams's attitude.