Never been this trip up

[Xinfu]

p.147-
"That is to say, I was in Cairo. I've never been this trip up the Nile before."
"You came over on the Carmanic, I believe - at least so Madame Doyle was telling me."
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Do the red words mean that during this trip he has not been to the Nile but before this trip he had?

[Rusty]

It could mean either that he has never taken that particular trip on the Nile before or that he has never been on the Nile before.

[Xinfu]

Good answer. Thank you.