For 20 years from the 1970s to the 1990s, Bangor-area book lovers could look forward to snagging their free special-edition bookmark, created by a Maine artist, from the Bangor Public Library each year. Luminaries including Dahlov Ipcar, Vincent Hartgen, Francis Hamabe and Carroll Thayer Berry all created original works, which were then mass-printed and distributed at the library as a call to donate to the Penobscot Valley Health Association. Those 29 original paintings and drawings, alongside new Maine Bicentennial-themed bookmarks created by a new crop of artists, will be on display from Feb.