Answer:
When Holmes asks Miss Morstan if the writing on the letters is similar to her fathers, she asserts it is not.
Step-by-step explanation:
Please see the excerpts:
"Is this handwriting the same as that upon the pearl-box addresses?"
"I have them here," she answered, producing half a dozen pieces of paper.
"You are certainly a model client. You have the correct intuition. Let us see, now." He spread out the papers upon the table, and gave little darting glances from one to the other. "They are disguised hands, except the letter," he said, presently, "but there can be no question as to the authorship. See how the irrepressible Greek e will break out, and see the twirl of the final s. They are undoubtedly by the same person. I should not like to suggest false hopes, Miss Morstan, but is there any resemblance between this hand and that of your father?"
"Nothing could be more unlike."
"I expected to hear you say so. We shall look out for you, then, at six. Pray allow me to keep the papers. I may look into the matter before then. It is only half-past three. Au revoir, then."