Maine’s Colby College Museum of Art has received a series of 100 etchings by Pablo Picasso. Known as the Vollard Suite, the series of Neoclassical sketches dates back to 1939 and is widely considered Picasso’s greatest achievement as a printmaker. Works from the Vollard Suite, which were donated by museum benefactors Peter and Paula Lunder, will go on view at the museum starting on June 2.