Yup lost several boxes over the years. One was stolen out of my car and was the nicest box I ever had...a 32 compartment wheatley...that was a gift and I miss it still to this day.
Ive fumbled twice in my career...one was my primary nymph box...fumbled it on the Madison about 5 years ago...lost several hundred nymphs...
I just lost...another one...it was a box of big anchor flys and stonefly nymphs...that went floating down the South Platte last sunday...I did write my name and number on the box but havent heard anything...its a bummer but not all that many flies I dont mind retying but i dont feel like buying another box..