In 1934, Marshall visited Knoxville, Tennessee and met with Benton MacKaye, a regional planner who gained support to designate and lay out the Appalachian Trail. Together with Harvey Broome, a Knoxville lawyer, they discussed Marshall's 1930 proposal for an organization dedicated to wilderness preservation. Bernard Frank, a fellow forester, joined them later in the year; the men mailed an "Invitation to Help Organize a Group to Preserve the American Wilderness" to like-minded individuals. The invitation expressed their desire "to integrate the growing sentiment which we believe exists in this country for holding wild areas sound-proof as well as sight-proof from our increasingly mechanized life," and their conviction that such wildernesses were "a serious human need rather than a luxury and plaything".