Nie do końca cię zrozumiałam ale może coś takiego:)
Dear John
I met you for the first time at the exhibition opening of your current show… I brought with me the payment for the picture I wanted to buy . I actually emailed ya one time but never knew you personally.
And then you told you had left the picture at your hotel. (and it was okay, I did not seriously expect that you would bring it to the vernisage.)
Next morning, while going to meet a friend in a near by cafe, I ran into you in the front of my home here on the upper town section! You were hailing a cab. (And!) You happened to have the picture with you…
And so you gave it to me… right there in the street.
Warszawa is such a tiny little town sometimes… when things go well it is.