Placement of the word "later" in a sentence

Why is it correct to say "it later came to pass" instead of "it came to pass later"? What is the rule for this placement?

Solution 1:

There is no particular ironclad rule that I can think of, but the first sounds immeasurably better to my ear.

1. It later came to pass that. . . .
2. It came later to pass that. . . .
3. It came to pass later that. . . .

Solution 2:

Both are perfectly grammatical.

To me the second construction is in general hugely more idiomatic English (It happened later). But the first form has a slightly literary or archaic feel, and so matches better with the literary phrase came to pass.