The 9ft in Common: A Manifesto for the Alleyways is a research project exploring the potential of the city’s alleyways for play, growth, and connection Example of hag stones A citywide treasure hunt, offering people the chance to uncover ceramic treasures, is under way, encouraging explorers to investigate Belfast’s urban alleyways. 9ft in Common: A Manifesto for the Alleyways is a research project exploring the potential of the city’s alleyways for play, growth, and connection..