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56 THE CONDOR Vol. XIV Orioles were everywhere, and contained variously fresh or incubated eggs or young just hatched. Several pairs of Rock Wrens (Salpinctes obsoletus) were present, and a pair of Canyon Wrens (Catheri?es ?nexicanus consi?ersus) were feeding a family of full grown young. Discouraged by our poor luck, we worked back down the canyon, going some distance below our camping place. A nest full of young Black Phoebes was found on a ledge under a projecting boulder. Several White-throated Swifts (Aero?iautes melanoleucus) were skimming a pool of Water. Otherwise the results were a counterpart of our experience up the canyon. We investigated several giant cactuses without finding anything except a family of young Gila Woodpeckers (Centurus uropygialis). There were three young fully grown. Returning to the machine, we lunched, loaded our dunnage, and started toward Tucson. We stopped where the Martins had been seen but there were no signs of nests. By using considerable care I was able to climb about a dozen of the largest giants. Three Elf Owls were found on their nests and one set of three incubated eggs secured. The other two nests contained newly hatched young and pipped eggs. Ch. ollas of several varieties were present, and we found several nests of Palmer Thrasher. One set of four eggs was secured, a very unusual number. I have found but one other set of four, taken 'in the Huachuca Mountains. We walked about a mile from this point and came to the wash from Sabino Canyon. Sycamores and cottonwood with a few willows and ash trees formed the fringe along it, but bird life was very scarce. I found a House Finch's nest built in an old Bullock Oriole's nest. It contained five fresh eggs. Four is the usual set in this section, though five is not an uncommon number.. Returning to the machine from here, we continued on into Tucson, an(J picked up our ladder which I had ordered. It was a light affair sixteen feet long and was readily carried alongside.over the fenders. Since it was late by this time, we could make but a short run a few miles east of town and camp. Darkness overtook us before we finished supper and had the beds made down. Texas Nighthawks (Chordtiles a. te.rensis) were quite numerou?'?i?d darted back and forth close to our heads. The.'growth was prin- cipally chollas and grease-wood, with some small mesquite and a few palo verde. Bendire Thrashers ( To2:ostoma benditel), Palmer Thrashers, Plumbeous Gnat- catchers, Cactus Wrens (1-teleodytes brunncicapillus couesi) and Road-runners (Geococcyx califiornianus) constituted the bird life in that immediate section. Nests of young of all the species mentioned were found in a few minutes walk the next morning. We secured one set of fresh eggs of Bendire Thrasher and found several nests of the same ready for eggs. It seemed to be just between the time for the first and second broods for them. Many young of the first brood were seen running around among the chollas. We did not tarry long here but pulled out for the mesquite forest eleven miles south of the city. The newly completed road was inches deep with dust, and the old road' full of chuck holes, so going was slow. Arriving at the first sahuaro, scarred with the assaults of former years, I shouldered the ladder and George carried the other traps. In a few moments I was among the arms of my old antagonist (they always seem such to me), and the first hole cut into gave me a fine set of three Elf Owl. I lifted the bird from the nest and tossed her into the air. She dropped like a stone nearly to the ground and then spread her wings and flew off into the underbrush. Incubation was well begun. Carrying my