Madagascar, <span>Seychelles Islands, Zanzibar</span>
Some of the challenges are:
Finding out what the characters carved/written on the papyrus are because the papyrus is so weathered and roughed up.
Then actually deciphering the characters was another challenge.
You basically had to have an idea of what the characters meant ^^
Did you mean wave(s)?
If so, p and s waves should be your answer.
Hope this helps!
Lisbon is the capital of Portugal in Europe.