A longtime crafter, Leen worked primarily with clay and did bookbinding. But a decade ago she saw the work of the Dutch felt artist Claudy Jongstra and was drawn to the felt-making process. She experimented by dragging loose sheep’s wool, wrapped around a concrete roller, behind a tractor along the harborfront; after an hour, the fibers would interweave and create a fabric. More recently, following three years of trial and error, she built a large steel machine in her workshop that ...