As I mentioned in a previous question, I am trying to play through Praser 5, an old interactive fiction freeware game. In it, you visit four Marks, the marks of earth, air, fire and water. Each has a name found by solving a series of riddles and taking the first letter of each word in the solutions to the riddle.
Also, in the game, you discover the names of mythical creatures and use the names to get more riddles.
I have solved three of four marks. However, the Mark of Water is a giant chalice with words that say:
As I contain the waters of the world, so the 7 names are contained. (And they're names, not Names.)
I've looked up the atomic number and abbreviations on the periodic table, but I don't know how to proceed. In an old forum, someone who solved it said it was a "fiendish puzzle" and that "the introductory text is very misleading".
The solutions to the other marks were ordinary English words (for instance, one was "wheel".
Edits from comments I have discovered that the answer is "diamond" using a decompiler. Diamond is contained in the seven words, but not in any uniform way. Why is diamond the right answer?
Copied from comments
"For those who want to see the riddle firsthand you can go to http://www.eblong.com/zarf/zweb/praser5/ to play Praser 5 online. To get to this riddle just type 'literal', then 'south', then 'read'. – finsternis 6 hours ago"
Rationale for accepted answer I think that the reasoning in the answer is mostly correct. I think it is easier to find English words in the element names first, and then try out the various possibilities (like ado/don) to see which ones give you the correct answer.
Also, for the wheel problem, I agree that the Hagia Sophia should be the second answer.