لابدmust للسائحfor the traveler منof (part of the expression 'must') أنthat يرىhe sees
لابد للسائح من أن يرى
ماwhat لمnot (past negation) كنbe! (likely a typo for يكن, 'was') يخطرoccur فيin فكرهِhis mind
ما لم كن يخطر في فكرهِ
The traveler is bound to see
The traveler must see
what had never crossed his mind.
What had not crossed his mind
Claude 2 is inferred from the historical translator configuration. The original record does not identify its model.