Of course this excited a curiosity so vast that it almost belittled the main matter—but the Welshman allowed it to eat into the vitals of his visitors, and through them be transmitted to the whole town, for he refused to part with his secret.
There are no more uses of "belittle" in the book.
Show samples from other sources
The gradualness of the change does not belittle its importance.
He needs to learn to disagree without belittling his opponent.