Should this be in the errata? I came here with the exact same question. I suspect it should read:
"Take a [124+] card. If it is not available, take two [49+] cards and a [154+] card. Return the Dialogue Book."
The use of the word "latter" implies the second in a choice of two, but there's only one primary reward here.
Edit: And if this is intended, dialogue 172 should also discard or banish the source event card 126. Otherwise, once you solve this puzzle, it's a source of infinite 49s... This is definitely an error.
