BILL OBLIGATORY. An instrument in common use and too well known to be
misunderstood. It is a bond without condition, sometimes called a single
bill, and differs in nothing from a promissory note, but the seal which is
affixed to it. 2 Serg. & Rawle, 115. See Read's Pleaders' Assistant, 256,
for a declaration setting forth such a bill. Also West's Symboleography, s.
100, 101, for the forms both with and without a penalty.