CHASE

Note the change from lines to dots to show a change in bowing style to match the change in dynamic. Hellmesberger may intend the piano 16ths to be played with a springing bow.

Like David, Hellmesberger is unwilling to slur from the first note, but he doesn't follow David in adding a second slur.

Hellmesberger takes over David's bowing, enhancing its effect with added accents.

The "sempre staccato" appears simply to mean separate bows, continuing the broad detaché stroke shown by the lines at the start of the bar.