Spawning Creek, W side Lake Schrader, 145 deg.11'40", 69 deg.25'08", 2908 ft. SW Lake Schrader, 145 deg.11'30", 69 deg.24'32", 2925 ft. (July 27, 28, 1952). Lake Schrader, 145 deg.09'50", 69 deg.24'28", 2900 ft. (July 23, 24-30, 1952). East side Lake Schrader--Lake Peters Channel, 145 deg.09'30", 69 deg.24'15", 2905 ft. (July 29, 30, 1952). [Illustration: Fig. 1. Routes of travel and base camps of field party in 1951 and 1952. 1. Point Barrow 8. Umiat 2. Teshekpuk Lake 9. Lake Schrader-Lake Peters 3. Topagaruk 10. Wahoo Lake 4. Kaolak River 11. Driftwood 5. Kaolak 12. Porcupine Lake 6. Reconnaissance flight 13. Chandler Lake 7. Gavia Lake ] Mouth Chamberlin Canyon, S end Lake Peters, 145 deg.08'34", 69 deg.20'58", 3690 ft. (Aug. 4, 5, 1952). SE end Lake Peters, 145 deg.09'26", 69 deg.20'56", 2950 ft., Romanzof Mountains (Aug. 1-9, 14, 1952). Mount Mary, S end Lake Peters, 145 deg.10'05", 69 deg.20'35", 3012 ft. (The mountain between Carnivore River on the east, Whistler Creek on the west, mouth of Whistler Creek on the north, and the crest of the Brooks Range on the south.) (Aug. 13-16, 1952.) Mount Mary, S end Lake Peters, 145 deg.10'02", 69 deg.20'30", 2920 ft. (July 30-Aug. 11, 1952). S end Lake Peters, 145 deg.09'50", 69 deg.20'15", 2906 ft. (Aug. 15, 1952). Weasel Point, S end Lake Peters, 145 deg.09'30", 69 deg.20'15", 2920 ft. (Aug. 9-11, 1952). Carnivore Lakes (Carnivore is the name of the three lakes at elevations of 3260, 3385 and 3400 ft. between 69 deg.18' and 69 deg.17' on Carnivore River, which flows from James Robert Lake to Lake Peters). (Aug. 8, 1952.) James Robert Glacier, 145 deg.09', 69 deg.16', approximately 3700 ft. (Aug. 8, 1952). Wahoo Lake (July 3-11, 1952). Longitude and latitude taken from map entitled "Preliminary Copy," Naval Petroleum Reserve No. 4, U. S. Geological Survey (of same series as map used at Porcupine Lake, see below). Wahoo Lake, 146 deg.58', 69 deg.08', 2350 ft. Driftwood (Aug. 27-31, 1952). Longitude and latitude computed from map cited above under Teshekpuk Lake. 2 mi. W Utukok River, 161 deg.15'30", 68 deg.54'50", 1275 ft. (Aug. 30, 1952). Driftwood, Utukok River, 161 deg.12'10", 68 deg.53'47", 1200 ft. (Aug. 27-31, 1952). Porcupine Lake (July 11-18, 1952). Longitude and latitude computed from map titled "Preliminary Copy," Naval Petroleum Reserve No. 4, compiled by U. S. Geological Survey, May, 1949, Alaska, K6, scale 1:4800. Porcupine Lake, 146 deg.29'50", 68 deg.51'57", 3140 ft. (July 12-16, 18, 1952). Mount Annette, 146 deg.28'51", 68 deg.50'38", approximately 5700 ft. (Mount Annette is in the Annette Range south of Porcupine Lake between the Canning River and the Ivashak River.) (July 17, 1952.)