The ornamental design for a paperholder, as shown and described.
FIG. 1 is a perspective view of a paper holder showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a right side elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a rear elevation view thereof.
The broken away symbols in the drawings indicate the appearance of any portion of the article between the break lines forms no part of the claimed design.
The broken lines showing the feet in FIGS. 2, 3, 4, 6, and 7 are included for the purpose of showing features that form no part of the claimed design.