> Obviously, the birds point to the aforementioned poem, but what of the
> patterns? The title of the poem contains the number six. The distance
> between is 4 and 10 are six; the same for 14 and 20.
> Playing the numerology game, 15 = 1+5 = 6, and there's two fifteens on the
> clock.
> 66=duh.
> I don't know where the 80 fits in though...

I'm not normally too much into the arithmetic stuff and other numerology (especially summing digits), but I did notice earlier that the sixth clock allows you to go
100 - 20 = 80
80 - 66 = 14
14 - 10 = 4

Leaving only the pair of 15s.

Why start with 100? Well, the numbers seem to be base 10, and there are a few other pairs and sets on other dials that get you to 100 (3 + 97, 51 + 47 + 2, 113 - 13, etc).

The problem with numerology is that it's far too easy to be misled by coincidence...