FIG. 1 is a front, top right perspective view of a supplementary mirror according to the invention;

FIG. 2 is a front, bottom right perspective view according to the invention;

FIG. 3 is a front elevational view according to the invention;

FIG. 4 is a rear elevational view according to the invention;

FIG. 5 is a right elevational view according to the invention and the left elevational view being a mirror image thereof;

FIG. 6 is a top plan view according to the invention; and,

FIG. 7 is a bottom plan view according to the invention.

The broken line representation of a fastener head in FIG. 4 is for the purpose of illustration only, and forms no part of the claimed design.