...and 1 USD

A couple of weeks ago, I find myself urgently in need of change and a man in a metro station persistently tries to help until he finds me 9 euro coins and 1 us dollar bill for the 10 euros I needed to break. I graciously accepted his help and embraced the 1 dollar as a good luck, not that I believe in any of this...  A couple of days later, just 5 hours before my plane leaves to Portugal, I drop my wallet as I was biking somewhere between the 5e and 13e neighborhoods of Paris.... (5 hours not worth going over) ...Miraculously, I make it back and forth between  Paris and Lisbon. My hopes in finding my lost wallet in a Samaritan form of a letter from the police or some lost-and-found authority did not fade with my empty p.o.box ever since I left Paris, 10 days ago. This Monday morning, I had a strong feeling that something must have filled my box. I asked the the girl at the front desk if I might have received any notice or mail during my absence. I even shamelessly insisted that she checks on today's mail (a 5-10 minute process of tedious name/number recognition) as she alluded to having just received all mail for the weekend. The very last of envelopes had a letter that read as follows (in french):

Dear Mr. ... we have traced your address from your ID to inform you that we have found your wallet with your ids and cards, 280 euros and 1 us dollar.