As an adjective, as used here, it means “hastily”; as a verb, to make haste, Compare “lightfoot”.  See our discussion of “Hotfoot and Lightfooted“.

• 14.009 But the grim-voiced fellow ran hotfoot to the Master.

“hotfoot, adv. and adj.” OED Online. Oxford University Press, December 2015. Web. 18 February 2016.

“hotfoot, v.” OED Online. Oxford University Press, December 2015. Web. 18 February 2016.