Perhaps he was recalling their fight,with teeth and claws bared.Lesser men would let that stand between them,but to Caleb it meant nothing.Brance had every right to be angry with him for his betrayal,and Caleb would take those blows again if it meant closing the distance between them.
Perhaps he too felt whatever it was that ate Caleb up inside,this passion,this desire,this needfor something like himself.They were two sides of the same coin,two halves of one whole,and the primal urge to connect consumed them both.