Recently the concept of a
retractable group has been introduced. This class of groups contains the class of
lattice-ordered groups as a proper subclass, and, in particular, contains the
class of all torsion-free abelian groups. Retractable groups enjoy many of
the properties of lattice-ordered groups; in fact, most results concerning
lattice-ordered groups have immediate extensions to this wider class. In this
note, we investigate the retractability of certain two-generator one-relator
groups.