Information from the 2015 Convention: Please join us in singing from The Sacred Harp at the seventeenth annual session of the Keystone Sacred Harp Convention, Saturday and Sunday, January 24-25, 2015 at The Rotunda, 4014 Walnut St, Philadelphia, Pennsylvania 19104 in West Philadelphia. There will be additional singings on Thursday, Friday, and Sunday evenings. All events are free and open…