In Longfellow's The Tide Rises, The Tide Falls, how does the title foreshadow that the traveler won't return?

Question

The tide rises, the tide falls,
The twilight darkens, the curlew calls;
Along the sea-sands damp and brown
The traveler hastens toward the town,
And the tide rises, the tide falls.
Darkness settles on roofs and walls,
But the sea, the sea in darkness calls;
The little waves, with their soft, white hands
Efface the footprints in the sands,
And the tide rises, the tide falls.
The morning breaks; the steeds in their stalls
Stamp and neigh, as the hostler calls;
The day returns, but nevermore
Returns the traveler to the shore.
And the tide rises, the tide falls.

Answer 1

The title suggests the timelessness and regularity of nature, which continues regardless of our presence, as opposed to our momentary residence here.

Further foreshadowing is here:
"The little waves, with their soft, white hands
Efface the footprints in the sands,"

and here is what's foreshadowed:
"The day returns, but nevermore
Returns the traveler to the shore."