OK. I guess I just didn't do enough research. Thanks for doing it for me. Its pretty clear they have all gone missing. Two logged as not being in the caches where they still show in the inventory, and the third in the hands of a cacher who seems to have gone missing himself.
Don't seem to have much luck with travel bugs. The 4 I have started lasted 21, 14, 9 and 3 months. Wonder what the average is. I have been watching some for many years.
I guess we can consider this a closed topic. Thanks again, Plushcat