{ O.P.P. (Other Person's Property)???

About two or three months ago i lost my BEAUTIFUL polka dot tote umbrella!! i forgot it on a seat in a matatu on a rainy day
This umbrella was special to me.. it was a gift from my Mother dearest from one of her trips to the Americas. I had it for 3 polka dot years.. It would fit snugly in my bag, but when opened it would be large enough to cover three people!!
In the 3 years i'd had it, i NEVER came across one like it around... it was unique!!
I knew, that i would spot it one day.

Yesterday, i was in a matatu..it was drizzling.. traffic was yuuurgh!!  
a woman walks past my window carrying MY polka dot tote umbrella!!!! spoiled on one side just like i remember it!!  OMG!!
*heart racing...eyes popping..fast breathing!! -- MY UMBRELLA!!
I watched her...pace around holding MY umbrella.. debating with my not-sensible self  if i should get out of the car and get MY property?!
Is it still considered MY property?? ---  now that she found it, do i still have claim to it?
Is it now considered O.P.P?

Peps.