[4] "What we know is very slight; what we don't know is immense."
[5] Brewster relates (Life of Sir Isaac Newton, Vol. II, p. 407) that, a short time before his death, Newton remarked: "I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the seashore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me."
[6] See Vol. I, p. 292, note 1 {632}.
[7] "What is all that!"
[8] "I have some good news to tell you: at the Bureau of Longitudes they have just received a letter from Germany announcing that M. Bessel has verified by observation your theoretical discoveries on the satellites of Jupiter."
[9] "Man follows only phantoms."
[10] See Vol. I, page 382, note 13 {786}.
[11] Dieudonné Thiébault (1733-1807) was a Jesuit in his early life, but he left the order and took up the study of law. In 1765 he went to Prussia and became a favorite of Frederick the Great. He returned to France in 1785 and became head of the Lycée at Versailles.
[12] Memories of Twenty Years of Residence in Berlin. There was a second French and an English edition in 1805.
[13] Richard Joachim Heinrich von Mollendorff (1724-1816) began his career as a page of Frederick the Great (1740) and became field marshal (1793) and commander of the Prussian army on the Rhine (1794).