Sullivan worked through the idea of a blocked house repeatedly, with variations, in different media. From 1976 to 1979, she created a series of photomontages from pictures she took of houses and other structures. Blocked Phone Booth belongs to this series. The phone booth was chosen because its walls and door are made of glass and therefore clearly reveal the boulders that fill it, suggesting blocked communication.   In 1977 and 1978 Sullivan developed performative approaches to the same idea. She painstakingly filled the open doors and windows of abandoned houses she encountered during her European travels with rocks of various sizes until the apertures were completely blocked, and then she set out to unblock them.   The photographs, photomontages, and performances show how Sullivan’s conceptual art practice functioned through repetition, allowing the artist to work through an idea and elaborate different visual solutions.   This Spotlight is excerpted from Françoise Sullivan: Life & Work by Annie Gérin.