Which English royal house was symbolized by a white rose?

Which British monarch came to the throne in 1837, less than a month after her 18th birthday? Which British monarch followed George V, Edward VIII and George VI? Which British philosopher and mathematician won the 1950 Nobel Prize in Literature? British playwright Tom Taylor wrote which farce that played at Ford's Theatre in April 1865? Which ship was found mysteriously deserted in the Atlantic in 1872? Who was the U.S. president when British troops set fire to the Capitol in 1814? British troops stormed ashore on which islands on May 21, 1982? Which weight system uses a 16-ounce pound equal to about 453.59 grams?