Year 1870 (MDCCCLXX) was a common year starting on Saturday (link will display the full calendar) of the Gregorian calendar and a common year starting on Thursday of the 12-day slower Julian calendar.

Joseph Joachim Raff (May 27, 1822 – June 24 or June 25, 1882) was a German-Swiss composer, teacher and pianist.

Raff was born in Lachen in Switzerland. His father, a teacher, had fled there from Württemberg in 1810 to escape forced recruitment into the military of that southwestern German state that had to fight for Napoleon in Russia. Joachim was largely self-taught in music, studying the subject while working as a schoolmaster in Schmerikon, Schwyz and Rapperswil. He sent some of his piano compositions to Felix Mendelssohn who recommended them to Breitkopf & Härtel for publication. They were published in 1844 and received a favourable review in Robert Schumann's journal, the Neue Zeitschrift für Musik, which prompted Raff to go to Zürich and take up composition full time.

In 1845, Raff walked to Basel to hear Franz Liszt play the piano. After a period in Stuttgart where he became friends with the conductor Hans von Bülow, he worked as Liszt's assistant at Weimar from 1850 to 1853. During this time he helped Liszt in the orchestration of several of his works, claiming to have had a major part in orchestrating the symphonic poem Tasso. In 1851, Raff's opera König Alfred was staged in Weimar, and five years later he moved to Wiesbaden where he largely devoted himself to composition. From 1878 he was the first Director of, and a teacher at, the Hoch Conservatory in Frankfurt. There he employed Clara Schumann and a number of other eminent musicians as teachers, and established a class specifically for female composers (this was at a time when women composers were not taken very seriously). His pupils there included Edward MacDowell and Alexander Ritter.

Henry George (September 2, 1839 – October 29, 1897) was an American writer, politician and political economist, who was the most influential proponent of the land value tax, also known as the "single tax" on land. He inspired the economic philosophy known as Georgism, whose main tenet is that people should own what they create, but that everything found in nature, most importantly the value of land, belongs equally to all humanity. His most famous work, Progress and Poverty (1879), is a treatise on inequality, the cyclic nature of industrial economies, and the use of the land value tax as a remedy.

George was born in Philadelphia, Pennsylvania, to a lower-middle class family, the second of ten children of Richard S. H. George and Catharine Pratt (Vallance) George. His father was a publisher of religious texts and a devout Episcopalian, and sent George to the Episcopal Academy in Philadelphia. George chafed at his religious upbringing and left the academy without graduating. His formal education ended at age 14 and he went to sea as a foremast boy at age 15 in April 1855 on the Hindoo, bound for Melbourne and Calcutta. He returned to Philadelphia after 14 months at sea to become an apprentice typesetter before settling in California. After a failed attempt at gold mining in British Columbia he began work with the newspaper industry during 1865, starting as a printer, continuing as a journalist, and ending as an editor and proprietor. He worked for several papers, including four years (1871–1875) as editor of his own newspaper San Francisco Daily Evening Post.

Colonel Frederick Gustavus Burnaby (3 March 1842 – 17 January 1885) was an English traveller and soldier.

He was born in Bedford, the son of the Rev. Gustavus Andrew Burnaby of Somerby Hall, Leicestershire, and canon of Middleham in Yorkshire († 15 July 1872), by Harriet, sister of Henry Villebois of Marham House, Norfolk († 1883). He was educated at Bedford School, Harrow, Oswestry School (where he was a contemporary with William Archibald Spooner), and in Germany. He entered the Royal Horse Guards in 1859. Finding no chance for active service, his spirit of adventure sought outlets in balloon-ascents and in travels through Spain and Russia. In the summer of 1874 he accompanied the Carlist forces as correspondent of The Times, but before the end of the war he was transferred to Africa to report on Gordon's expedition to the Sudan. This took Burnaby as far as Khartoum. Returning to England in March 1875, he matured his plans for a journey on horseback to the Khanate of Khiva through Russian Asia, which had just been closed to travellers. His accomplishment of this task, in the winter of 1875-1876, described in his book A Ride to Khiva, brought him immediate fame. His next leave of absence was spent in another adventurous journey on horseback, through Asia Minor, from Scutari to Erzerum, with the object of observing the Russian frontier, an account of which he afterwards published. In the Russo-Turkish War of 1877, Burnaby (who soon afterwards became lieutenant-colonel) acted as travelling agent to the Stafford House (Red Cross) Committee, but had to return to England before the campaign was over.