Location: Atlantis, Spotted Tower
Depth: 435

Solution to Atlantean Graves

by Nick Zehender, with art by Ruthi Hortsch

Answer: TRIPLE DECAPITATION

The inscriptions on the nine tombstones reference real-world heads of state, with some details changes to make them sound Atlantean. The inscriptions are ordered alphabetically by real-world name.

Count Aquarius I Abraham Lincoln
Blue Fin Alaric I
Prince Anchovy II Augusto Pinochet
Metis Quartz Catherine II
Blue Stream Cuitláhuac
Pontus of Styx Edmund Barton
Sir Dolphin Edward VIII
Eel the Brave Genghis Khan
Old Nereus Hammurabi
Poseidon the Wise Harald Bluetooth
Pacific X Louis XIV
Whirl the King Exiler Lucius Junius Brutus
Lord Neptune the Superior Nebhepetre Mentuhotep II
Poseidon XXV Pharnaces II
Pacific V Philip II
Ox the Patriarch Robert the Bruce
Moonrise I Shinzo Abe
Nemertia Wu Zetian

Each real world name is the same length as the corresponding fake name. For each pair of real and fake names, there is exactly one index at which they have the same letter. Ordering these letters chronologically by real-world head of state gives the answer.

NEBHEPETREMENTUHOTEPII
LORDNEPTUNETHESUPERIOR

HAMMURABI
OLDNEREUS

LUCIUSJUNIUSBRUTUS
WHIRLTHEKINGEXILER

PHARNACESII
POSEIDONXXV

ALARICI
BLUEFIN

WUZETIAN
NEMERTIA

HARALDBLUETOOTH
POSEIDONTHEWISE

GENGHISKHAN
EELTHEBRAVE
Erratum: there is also an overlapping H.

ROBERTTHEBRUCE
OXTHEPATRIARCH

CUITLAHUAC
BLUESTREAM

PHILIPII
PACIFICV

LOUISXIV
PACIFICX

CATHERINEII
METISQUARTZ

ABRAHAMLINCOLN
COUNTAQUARIUSI

EDMUNDBARTON
PONTUSOFSTYX

EDWARDVIII
SIRDOLPHIN

AUGUSTOPINOCHET
PRINCEANCHOVYII

SHINZOABE
MOONRISEI

These letters spell the answer, TRIPLE DECAPITATION.