than met

How she might have come into possession of the vicar’s missing bicycle clip remained something of a mystery, but mightn’t it have been in the vicarage all along!
By his own admission, the vicar’s absentmindedness was becoming a problem. Hence the engraved initials. Perhaps he had left home without the clip last Thursdays and shredded his trouser cuff because he wasn’t wearing it.
The details were unimportant. One thing I was sure of: There was more going on in the vicarage than met the eye, and whatever it was (husband dancing naked in the woods, and so forth), it seemed likely that Cynthia was at the heart of it all.

**
There’s a verb, met, after conjunction ‘than.’ Is there something that omitted before met?