There are modern Hill bows, which are flatbows made with fiberglass, or the bows Hill shot.
These were American longbows- twice your draw plus 16". The limbs were rather narrow and either flat (like his Boo bows) or slightly rounded (as he did selfbows). The handle was deep, short, and only slightly narrowed, if at all. They followed the string and he made them to pull as heavy as he could get them. They are braced with one inch for every foot in length, and are an offshoot of the old English longbow, just with a handle, no horn nocks, and slightly shorter. He made them to bend their full legnth, slightly sitff at the very center (grip).