Portable Lantern

1 . 1 is a front perspective view of a portable lantern showing the new design;

1 . 2 is a front view thereof;

1 . 3 is a back view thereof;

1 . 4 is a left-side view thereof;

1 . 5 is a right-side view thereof;

1 . 6 is a top view thereof; and

1 . 7 is a bottom view thereof.

The dashed broken lines depict portions of the portable lantern that form no part of the claimed design.