For this reason, the former must be made the basis for a rational theory of the development of the Babylonian pantheon through the various periods above instanced.

The data furnished by the religious texts can be introduced only, as they accord with the facts revealed by the historical inscriptions in each period.
Taking up the group of inscriptions prior to the union of the Babylonian States under Hammurabi, _i.e._, prior to 2300 B.C., we find these gods mentioned: Bel, Belit, Nin-khar-sag, Nin-girsu, also appearing as Shul-gur, Bau, Ga-tum-dug, Ea, Nin-a-gal, Nergal, Shamash, under various forms A, who is the consort of Shamash, Nannar or Sin, Nana, Anunit, Ishtar, Innanna or Ninni, Nina, Nin-mar, Dun-shagga, Gal-alim, Anu, Nin-gish-zida, Nin-si-a, Nin-shakh, Dumu-zi, Lugal-banda and his consort Nin-gul, Dumuzi-zu-aba, Nisaba, Ku( ?)anna, Lugal-erima( ?), Dagan, Ishum, Umu, Pa-sag, Nin-e-gal, Nin-gal, Shul( or Dun)-pa-uddu, and Nin-akha-kuddu.
Regarding these names, it may be said at once that the reading, in many cases, is to be looked upon as merely provisional.

Written, as they usually are, in the ideographic "style," the phonetic reading can only be determined when the deity in question can be identified with one, whose name is written at some place phonetically, or when the ideographs employed are so grouped as to place the phonetic reading beyond doubt.
The plan to be followed in this book will be to give the ideographic reading[24] as provisional wherever the real pronunciation is unknown or uncertain.

The ideographic designation of a deity is of great value, inasmuch as the ideographs themselves frequently reveal the character of the god, though of course the additional advantage is obvious when the name appears in both the ideographic and the phonetic writing.

It will, therefore, form part of a delineation of the Babylonian pantheon to interpret the picture, as it were, under which each deity is viewed.
En-lil or Bel.
Taking up the gods in the order named, the first one, Bel, is also the one who appears on the oldest monuments as yet unearthed--the inscriptions of Nippur.