"If they are friends, they have reason for their hurry; and if enemies, the sooner we get under cover the better," he observed.  "We must not now attempt to reach the waggon.  Ah!  I understand all about it.  See! out there come a dozen or more horsemen.  They must be Indians in pursuit of the first--who, if I mistake not, are our friends.  Come on, Roger! they will reach the hill as soon as we do."