an owner of thoroughbred horses, tasker is noted in horse racing circles for having imported from england the mare "selima" between 1750 and 1752. sired by godolphin arabian, "selima" was raced until the end of the 1752 season then was sent to samuel ogle's belair stud in collington, maryland. as a broodmare, "selima" produced ten foals that would become an important bloodline in american racing with important racing offspring such as "hanover" and is even the ancestress of george washington's stallion, "magnolia."