September 26, 2016 Photo of the Week: Dominican Sister of Sparkill, Lois Liekweg, O.P., Amazed Over the Magic of an iPad 99 year old Sparkill Dominican Sister, Lois Liekweg, O.P., has been a Dominican Sister for 83 years. She will be 100 in December and she is learning to master the magic of an iPad (Photo by Sparkill Associate, Carole Davide, 09/14/16).