Franklin is still interested in Ezra Jennings, so he asks if they're walking the same way.
As they walk together, Franklin asks about Mr. Candy's illness.
Ezra Jennings says that Mr. Candy only has scraps of memories from that time.
When Jennings realizes that Franklin is very interested in Mr. Candy's memories from a particular period (the night of the birthday party), he says that there might be a way of digging out the memory.
Jennings says that while Mr. Candy had a fever, he had recorded everything that he'd said.
Most of it was just fragments – words and phrases that didn't seem to be connected.
But when he copied it out, it was possible to guess what was missing and to fill in the blanks.
Franklin is eager to see this, of course – some of Mr. Candy's ravings on the night of the birthday might have something to do with the Moonstone.
But Jennings is reluctant to show him, because of doctor/patient confidentiality.
Franklin Blake is about to explain the whole story to him, but Jennings tells him to wait – first, he wants to tell Franklin his own story, and afterward, Franklin can decide whether or not to trust him.
Jennings was falsely accused of a crime when he was younger, and although the court declared him innocent, the bad reputation stuck with him.
Everywhere he goes, the bad reputation follows him.
That, combined with his foreign appearance, is what makes him so unpopular.
Finally, he explains that he's dying of a fatal disease (probably some form of cancer), so he has to take opium for the pain.
Then Franklin tells Jennings about Rachel and the night of the birthday party.
He says that Rachel saw him take the diamond, but that he has absolutely no recollection of having done it.
Jennings asks whether he's ever taken opium.
Franklin says no, never.
Jennings then asks about how his sleep had been before the birthday party.
Franklin remembers that he was sleeping terribly in the weeks before the birthday party, because he'd just quit smoking cold turkey.
But the night of the birthday party he slept like a baby.
Jennings says it sounds like someone dosed him with opium – he'll look into his records of what Mr. Candy said during his illness.
He asks Franklin to come to Mr. Candy's office the next day.