Classic Poem

There is a thin line,
There is a veil …
I have seen a sea-wall,
A hill-range, more frail.

I know a causeway,
Swept of sea-wind
Where no toll is asked for
But a cloak left behind.

I have seen many,
While winds blow,
Slip their cloak, crossing
And never know.

It is a Border
Travelers may range
Either side to other
With a cloak's change.