The envelopes come from the shell bucket and if you click the bucket super fast to get a lot of pebbles, it will randomly spit out a mysterious letter. I am on level 15 and i have gotten 4 mysterious letters from doing this so now I have a mysterious island. The mysterious island usually popes out coin bundles and gems, but every once in a while it will pop out a mysterious fossil. Have fun!!
Comment found on Travel Town: I ’ m at level...
The 2 envelopes from the buckets make a map from there you will get an island and the fossil are with that.. just don’t know what we do with them lol I have two just sitting there
Comment found on Travel Town: How to get mysterious fossill