Arnold Patrick Spencer-Smith FRHistS (17 March 1883 – 9 March 1916) was an English clergyman and amateur photographer who joined Sir Ernest Shackleton's 1914–1917 Imperial Trans-Antarctic Expedition as chaplain on the Ross Sea party, who were tasked with laying a chain of depots across the Ross Ice Shelf towards the Beardmore Glacier for Shackleton's intended crossing party.

He shared a birthday with Lawrence Oates, who died on his return from the South Pole with Robert Falcon Scott on the Terra Nova Expedition.

[7] After arrival in Antarctica his unfamiliarity with polar work and limited physical stamina were in evidence during the first depot-laying journey of January–March 1915, before he was sent back to base by expedition leader Aeneas Mackintosh.

[9] The circumstances of the expedition, after the depletion of the shore party following the loss of SY Aurora in May 1915, meant that Spencer-Smith was required for the main depot journey to the Beardmore Glacier during the 1915–1916 summer season, irrespective of his physical limitations.

However, worn down by the preliminary work of hauling stores up to the base depot at Minna Bluff during the four-month period September–December 1915, and the effects of scurvy, he was unable to sustain the physical effort required on the main depot-laying journey south, and collapsed before the Beardmore was reached.

[11] The party nevertheless completed its depot-laying mission and struggled back northward in worsening weather conditions, each man growing weaker as scurvy took hold, and progress forward was with acute difficulty.

Spencer-Smith, uncomplaining but in the latter stages occasionally delirious,[12] died on the Barrier on 9 March 1916, aged 32, two days before the safety of Hut Point was finally reached.

[13] Spencer-Smith's condition, along with his expedition leader Aeneas Mackintosh, weakened well before the other man in their three-man hauling party, Ernest Wild.