In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.

Passage: Following a year at Sandhurst, Evans entered the British Army with a commission in the Black Watch as second lieutenant on 23 December 1899, and served with the 2nd battalion in the Second Boer War in South Africa. He took part in operations in the Orange Free State February to May 1900, including the battles of Poplar Grove, Driefontein and Vet River; operations in the Transvaal May-June 1900, including the actions around Johannesburg, the occupation of Pretoria and the battle of Diamond Hill; and the battle of Battle of Belfast (August 1900). After the end of the conventional war he served with his battalion in the Orange River Colony during the Boer guerrilla warfare until peace was declared in June 1902. Following the end of the war in South Africa he left Point Natal for British India on the SS Ionian in October 1902 with other officers and men of his battalion, which after arrival in Bombay was stationed in Sialkot in Umballa in Punjab.. After service with his regiment in India, Evans returned to England and obtained a pilot's certificate.
Link Information: 18881907 (1st Battalion): Gen. Sir Robert Rollo, KCB Answer: Gen. Sir Robert Rollo
Who is the commanding officer of the Black Watch when Evans was a second lieutenant?