The eastern of two peaks, rising to 3,030 metres (9,940 ft) high at the north end of the Adams Mountains.

Discovered and roughly mapped by the Southern Journey Party of the BrAE, led by Ernest Shackleton, which was abreast of this mountain on December 13, 1908.

Named by US-ACAN in 1986 after David J. Drewry, British glaciologist; a leader of the SPRI-NSF-TUD airborne radio echo sounding program, 1967-79; Director, Scott Polar Research Institute, 1984-87; Director, British Antarctic Survey, from 1987.

A peak, 3,360 metres (11,020 ft) high, standing 4 nautical miles (7.4 km; 4.6 mi) southeast of Mount Dickerson.

Named by US-ACAN for Elwood E. Barnes, USARP cosmic rays scientist at Hallett Station, 1963.