Ernest Marsh Lloyd, Dictionary of National Biography… (1912)
“ There was in fact a rare combination in Butler of the qualities needed for such work. Tall, strong, and active, he was quick of observation and full of resource; genial, yet with much force of character, he was a ready writer, and had the gift of style. He was also a good draughtsman. Lord Wolseley has said that he was pre-eminent in imagination, 'that quality so much above the other gifts required for excellence in military leaders ' (Wolseley, ii. 202) . ”
