The Brain, within its Groove — The Mill of the Floss

The Brain, within its Groove 1
Runs evenly-and true-
But let a Splinter swerve-
'Twere easier for You-

To put a Current back-5
When Floods have slit the Hills-
And scooped a Turnpike for Themselves-
And trodden out the Mills-
(F.563/J.556)
[1] Brain, Groove:: idea, thinking in a usual way. This poem is about The Mill of the Floss (1860) by George Eliot.
[2] evenly and true:: indicating Tom Tulliver, Maggie's brother.
[3, 4] swerve, easier, You:: indicating Maggie Tulliver.
[5] Current:: alluding the relationship of Maggie and Tom.
[6, 8] Floods, Mills:: Dorlcote Mill was destroyed by the floods.