The Time Machine And The Time Patrol

(i) HG Wells' Time Machine is an elaborate contraption hand built by its single inventor in the nineteenth century whereas Poul Anderson's timecycles are streamlined high tech machines mass produced in the far future. Travelers sits on, not inside, both.

(ii) Wells' Time Traveler witnesses the universe fast forwarding, then rewinding, whereas Anderson's Time Patrolers experience no duration between departure and arrival. (Anderson's Jack Havig shares the Time Traveler's experience in this respect.)

(iii) In The Time Machine, the single Time Traveler makes one round trip to the future, then disappears, whereas the Time Patrol is an organization routinely moving through history and prehistory.

(iv) The Time Machine merely hints at "...curious possibilities of anachronism and of utter confusion..." whereas the Time Patrol polices temporal paradoxes.

(v) Humanity devolves into Morlocks and Eloi or evolves into Danellians.

(vi) The Time Machine is a single, complete work whereas the Time Patrol is a growing, increasingly elaborate series that is partly an update and partly an alternative conception of time travel.