Definition of "somewhy"

Out of the drift of facts, whereby you learn What some was, somewhere, somewhen, somewhy?

1864, Robert Browning, “Mr. Sludge, "The Medium"”, in Wikisource, line 505‎, retrieved 2012-01-18

I loved them both—but not so very much else in the book—but I read them over twice & thought—somewhy—of Highland Park & our quaint little trips to Los Angles[sic] & elsewhere thereabouts on the street car.

1988, William Morris, 1924, quotee, edited by Thomas P. Riggio, Letters to Women: New Letters‎, Reprint edition, University of Illinois Press, published 2009, page 179

Somewhy I've always had this stupid idea that something or something or somebody awful is waiting here for me.

2003, Cameron Royce Jess, Bearer of the Chose Seed‎ (Fiction), Inscape Publications, page 15

But somehow, somewhy, he did something and that woman knew it. And somehow, somewhy on a whole lot of other days he doesn't do anything we can see ...

2008, Margaret Feinberg, “Bring Them to Me”, in The Sacred Echo‎, Zondervan, page unk

Or is it actually him? Still holding on somewhere, somehow, somewhy.

2011, Issac Marion, Warm Bodies‎ (Fiction), Simon and Schuster, page 92