sentences:  After a fruitless track for the "Tyrannosaur" so that Holtzinger's body could be recovered, a furious quarrel with James ensues, he and the guides each blaming the other for their companion's death, leading to a fist-fight between James and Rivers in which James is defeated.James tries to shoot Rivers, but is knocked out by Aiyar; afterwards he swears revenge.Later, after the expedition has returned to the present, James convinces Professor Prochaska, the inventor of the time chamber, to send him back to the Cretaceous again—but at a point just prior to the emergence of the safari's earlier visit.