RWhitcomb-editor June 15, 2021 Don’t leave the corridor RWhitcomb-editor June 15, 2021 “Gateways” (oil on canvas), by Dave Martsolf, in his show “Through the Eyes of a Child,’’ at the Art League of Lowell’s Greenwald Gallery, June 23-July 18. Mr. Martsolf (born 1949) lives and works in Windham, N.H. Searles Castle in Windham 19th Century textile mill (now a museum) and canal in Lowell