^ Rowena has implied in the Stormblood SMN story line that she does, in fact, have the proper terminals and tools to access the data in the tomestones.

Without giving too much away, "something-something" happened, and Y'mhitra and to WoL were advised by Rammbroes of the Sons of Saint Coinach to find more information about the Allagans from Rowena.

Rowena uncharacteristically agreed.

In fact, she offered to lend Y'mhitra the transcripts of what her flunkies had found so far, to save her from the trouble of getting the right equipment to access the tomestones in question, on the condition that Y'mhitra tells her about anything significant she learns. Rowena complained that there's too much data, and she doesn't have all the time in the world to browse ancient history.