The blog of interest was several layers down so this should take right to the
one Dwight mentioned. Several related entries before and after this one

John

http://timmanneychairmaker.blogspot.com/2013/06/carving-axe-edge-
geometry-and-grinding.html?m=1">http://timmanneychairmaker.blogspot.com/2013/06
/carving-axe-edge-geometry-and-grinding.html?m=1

Cruising the interwebs a couple weeks ago, I came across
the blog of Tim Manney, a chairmaker from Portland, Maine (
http://timmanneychairmaker.blogspot.com).  In one post, he described
modifying a carpenter's hatchet for use as a spoon carving hatchet.  I was
intrigued and decided to try the same.  His version has an asymmetrical
bevel (longer on the side closest to the wood).