One thing that impresses everybody is Helen's tireless activity.
Aaron took quick steps, the way Alex did, and Rob had a tireless power walk.
It was nothing but excitement from first to last--drives, luncheons, receptions, and all that they involve when you have an eager, tireless child like Helen on your hands.
Aquitaine bordered upon Mussulman Spain; the Avars of Hungary threatened Bavaria with their tireless horsemen; beyond the Elbe and the Saul the Slays were perpetually at war with the Saxons, and to the north of the Eider were the Danes.
A firm will, tireless energy, aggressive courage and bold self-confidence were its leading qualities; the word " intensity " perhaps best sums up his character.