Donna Sewall Davidge, Owner.Sewall House has been offering small personalized ongoing retreats and workshops May to October since 1997 in the historic home where TR healed of asthma with Donna/s (who has been teaching in NYC since the mid 1980’s) great grandfather William Sewall.near hikes, lakes, offering massage, sauna and yummy vegetarian food. See our Trip Advisor reviews- featured in much press.