I noticed people disappeared — Purity

I noticed people disappeared, 1
When but a little child,-
Supposed they visited remote,
Or settled regions wild.

Now know I they both visited 5
And settled regions wild,
But did because they died,-a fact
Withheld the little child!
(F.1154/J.1149)
[1] people disappeared:: children disappeared when they became men or women.
[3] remote:: strange, too matured for a child.
[4] wild:: uncivilized.
[6] settled, wild:: adjusted to a ferocious adult's world.
[7] died:: lost one's purity, innocence.