The accompanying illustration, which is reproduced from the Boundary
Stone of Ritti-Marduk (Brit. Mus., No. 90,858), supplies much
information about the symbols of the gods, and of the Signs of the
Zodiac in the reign of Nebuchadnezzar I, King of Babylon, about 1120
B.C.. Thus in Register 1, we have the Star of Ishtar, the crescent of
the Moon-god Sin, and the disk of Shamash the Sun-god. In Reg. 2 are
three stands (?) surmounted by tiaras, which represent the gods Anu,
Enlil (Bel) and Ea respectively. In Reg. 3 are three altars (?) or
shrines (?) with a monster in Nos. 1 and 2. Over the first is the
lance of Marduk, over the second the mason's square of Nabu, and over
the third is the symbol of the goddess Ninkharsag, the Creatress. In
Reg. 4 are a standard with an animal's head, a sign of Ea; a
two-headed snake = the Twins; an unknown symbol with a horse's head,
and a bird, representative of Shukamuna and Shumalia. In Reg. 5 are a
seated figure of the goddess Gula and the Scorpion-man; and in Reg. 6
are forked lightning, symbol of Adad, above a bull, the Tortoise,
symbol of Ea (?), the Scorpion of the goddess Ishkhara, and the Lamp
of Nusku, the Fire-god. Down the left-hand side is the serpent-god
representing the constellation of the Hydra.

The mutilated text of the Fifth Tablet makes it impossible to gain
further details in connection with Marduk's work in arranging the
heavens. We are, however, justified in assuming that the gaps in it
contained statements about the grouping of the gods into triads. In
royal historical inscriptions the kings often invoke the gods in
threes, though they never call any one three a triad or trinity. It
seems as if this arrangement of gods in threes was assumed to be of
divine origin. In the Fourth Tablet of Creation, one triad
"Anu-Bel-Ea" is actually mentioned, and in the Fifth Tablet, another
is indicated, "Sin-Shamash-Ishtar." In these triads Anu represents the