Galactic Patrol by E.E. Smith

Out from Radelix and into deep space shot the speedster, bearing the gray Lensman toward Boyssia II, where the Boskonian base was situated. The patrol forces had not even yet been able to locate it definitely; therefore, it must be cleverly hidden indeed. It was manned and staffed by Tellurians -- and this was fairly close to the line first taken by the pilot of the pirate vessel whose crew had been so decimated by VanBuskirk and his Valerians. There couldn't be so many Boskonian bases with Tellurian personnel, Kinnison reflected. It was well within the bounds of possibility, even of probability, that he might again encounter here his former, but unsuspecting, shipmates.

Since the Boyssian system was less than a hundred parsecs from Radelix, a couple of hours found the Lensman staring down upon another green and Earthly world. Very Earthly indeed was this one. There were polar ice caps, areas of intensely dazzling white. There was an atmosphere, deep and sweetly blue, filled for the most part with sunlight, but flecked here and there with clouds, some of which were slow-moving storms. There were continents, bearing mountains and plains, lakes and rivers. There were oceans, studded with islands great and small.