Hill coined the term American semi-logbow. The following passage is taken from Hunting the hard Way p. 91.
"There are three distinct types of bows, the straight-end longbow, the short flat bow, and the composite or self recurve bow. Besides these main types there are many bastard designs that may have some feature of one or all of the other types. Of all the varying designs and combinations of features there has been only one bow developed in modern times that makes a better bunting bow than the conventional English longbow, and that is the American semi-longbow.
This modern type is not quite so long as its English prototype, but is a little wider and considerably flatter. At that, the American semi-long is not so flat as the American Indian short bow, and many times bowyers make the semi-long bow with recurved ends. However, the recurved ends make it too sensitive for a good hunting weapon."