Diamond (Newton’s favourite little dog)

One winter’s morning, while attending early service in Trinity College, Newton inadvertently left Diamond shut up in his room. On returning from chapel he found that the little fellow had upset a candle on his desk, by which several papers containing minutes of many yearsʹ experiments, were destroyed. On perceiving this irreparable loss, he exclaimed, “Oh, Diamond, Diamond, thou little knowest the mischief thou hast done!” (Diffusion of Useful Knowledge: Life of Newton, p. 25, col. 2.)