Odd Theory
However, what was the reason the wallets had been there and not with their owners? He had a rather strange theory in mind. After all, Seth could not think of a sensible explanation about why these girls would choose to leave the wallets there.

Odd Theory
Wallet Thief
“All the pictures seemed to be between 1945 and 1946. Best we can tell is that someone was stealing wallets and then ditched them behind the toilets in a heat vent,” Seth went on. The collection had been hiding in the air vent for decades. It took three-quarters of a century for the plumber to stumble upon it.

Wallet Thief