Did Holmes actually remember Umezaki Senior, or was he just being nice?
So, Holmes tells someone (Roger's mother, I think) that he wishes he'd lied to Mrs. Kelmot, or said SOMETHING to her to take the sting from her feelings, that it would have been better to have been dishonest, than to have left her feeling she had no option but to kill herself.
Immediately after that, he writes a letter to the younger Mr. Umezaki, telling him that he'd finally remembered his father. It immediately goes to flashback, as Holmes and some British official intervew Umezaki senior about letting him work for the British government. Then, it cuts to Holmes' letter, and you see him flesh out the details of the situation by grabbing information off the titles of some of his books.
On the one hand, it seems like he was lying, to make Umezaki junior feel better about his father abandoning him. It DID lead the viewer to that conclusion, given that it was right after he'd told someone that it's better to lie. On the other hand, because we see Umezaki senior ourselves in the flashback, it FELT like a real memory, merely padded a bit, to make for a better story.
Which is it? A wholly fabricated story, or a partially fabricated one?