Baron Revelstoke, of Membland in the County of Devon, is a title in the Peerage of the United Kingdom.
 It was created in 1885 for the businessman Edward Baring, head of the family firm of Barings Bank and a member of the Baring family.
 Baring was the son of Henry Baring, third son of Sir Francis Baring, 1st Baronet, and the nephew of Alexander Baring, 1st Baron Ashburton, the second cousin of Francis Baring, 1st Baron Northbrook, the elder brother of Evelyn Baring, 1st Earl of Cromer and the uncle of Evelyn Baring, 1st Baron Howick of Glendale.
 He was succeeded by his second but eldest surviving son John, the second Baron.
 John was a partner in Baring Brothers and Co. Ltd, a Director of the Bank of England, and also served as Lord Lieutenant of Middlesex.
 On his death the title passed to his younger brother Cecil, the third Baron.
 He acquired Lambay Island, north of Dublin, in 1904.
 s of 2013 the title is held by his great-grandson, the seventh Baron, who succeeded his father in 2012.
 As a descendant of Sir Francis Baring, 1st Baronet, he is also in remainder to the Baring Baronetcy of Larkbeer, a title held by his kinsman the Baron Northbrook.
The 1st Arkansas Infantry (1861–1865) was a Confederate Army infantry regiment during the American Civil War.
 The regiment was raised in April 1861 by Colonel Thompson B. Flournoy.
 It moved first to Virginia, but transferred back to Tennessee and served the rest of the war in the western theater, seeing action in the Kentucky, Tennessee and Georgia campaigns.
 Following its depletion in numbers, the regiment was consolidated several times with other Arkansas regiments, finally merging in 1865 into the 1st Arkansas Consolidated Infantry Regiment.
 There were three regiments known as "1st Arkansas" during the war.
 The second unit with the designation of "1st Arkansas" was the 1st Infantry, Arkansas State Troops, which was mustered into Confederate service at Pitman's Ferry, Arkansas, on 23 July 1861, under the command of Colonel Patrick Cleburne; this unit was eventually redesignated as the 15th Arkansas Volunteer Infantry.
 The third unit bearing the title "1st Arkansas" was the 1st Arkansas Volunteer Infantry, which served with the Union Army.
Václav Havel (] ; 5 October 193618 December 2011) was a Czech writer and former dissident, who served as the 1st President of the Czech Republic from 1993 to 2003.
 Prior to that he also served as the last president of Czechoslovakia from 1989 until its dissolution in 1992.
 As a writer of Czech literature, he is known for his plays, essays, and memoirs.
Gabriel Narutowicz (] ; 17 March 1865 – 16 December 1922) was a Polish professor of hydroelectric engineering and politician who served as the 1st President of Poland (1922); previously he was a Polish Minister of Public Works (1920–21) and Minister of Foreign Affairs (1922).
 He was assassinated in 1922, in his first week of assuming office as president.
José Mariano de la Cruz de la Riva Agüero y Sánchez Boquete Marquess De Montealegre de Aulestia (3 May 1783, Lima, Peru – 21 May 1858, Lima) was a Peruvian soldier, politician, and historian who served as the 1st President of Peru and 2nd President of North Peru.
 He was the first Head of State who had the title of President of the Republic and the first to wear a presidential sash representing the power he had (although it only was de facto, as the power surged from a Coup d'état).
Baron Gainford, of Headlam in the County of Durham, is a title in the Peerage of the United Kingdom.
 It was created in 1917 for the Liberal politician Jack Pease, a member of the Darlington Pease family.
 He notably served as President of the Board of Education from 1911 to 1915.
 Pease was the second son of Sir Joseph W. Pease, 1st Baronet, and the grandson of Joseph Pease, while Arthur Pease was his uncle and Sir Arthur Francis Pease, 1st Baronet, Beaumont Pease, 1st Baron Wardington, and Herbert Pike Pease, 1st Baron Daryngton, were his first cousins.
 The third baron was a former member of the London County Council and of the Greater London Council.
 s of 2013 the title is held by his younger brother, the fourth baron, an architect and town planner; County Planning Officer for Ross and Cromarty 1967-1975 and Scottish Office Inquiry Reporter 1978-1993.
 As a descendant of Sir Joseph W. Pease, 1st Baronet, he is also in remainder to this title.
On 11 and 12 September, during the Battle of Bzura, the British and the French made a decision not to help Poland.
 The ships with military cargo for Poland (to reach the Polish military through then neutral Romania) were turned around.
 In 1944, Abbeville was liberated by the General Stanislaw Maczek's Polish 1st Armoured Division.
The 4th Cavalry Regiment is a United States Army cavalry regiment, whose lineage is traced back to the mid-19th century.
 It was one of the most effective units of the Army against American Indians on the Texas frontier.
 Today, the regiment exists as separate squadrons within the U.S. Army.
 The 1st Squadron of the 4th Cavalry's official nickname is "Quarterhorse", which alludes to its 1/4 Cav designation.
 The 3rd Squadron of the 4th Cavalry's official nickname is "Raiders".
 Today, the "1st Squadron, 4th Cavalry", "2nd Squadron, 4th Cavalry", "4th Squadron, 4th Cavalry", and "6th Squadron, 4th Cavalry" are parts of the 1st Infantry Division, while the "3rd Squadron, 4th Cavalry" serves as part of the 25th Infantry Division.
 On 23 September 2009, the "4th Squadron, 4th Cavalry" officially stood up at Fort Riley, Kansas as part of the 1st "Devil" Brigade, 1st Infantry Division.
 On 28 March 2008, the "5th Squadron, 4th Cavalry" officially stood up at Fort Riley, Kansas as part of the 2nd "Dagger" Brigade, 1st Infantry Division.
 The 6th Squadron, 4th Cavalry served as part of the recently inactivated 1st Infantry Division, 3rd "Duke" Brigade, at Fort Knox, Kentucky.
Eligiusz Niewiadomski (Warsaw, December 1, 1869 – January 31, 1923, Warsaw) was a Polish modernist painter and art critic who belonged to the right-wing National Democratic Party till 1904 and later continued supporting it.
 In 1922 he assassinated Poland's first President, Gabriel Narutowicz, in his first week in office as president.
Stanisław Narutowicz (Lithuanian: "Stanislovas Narutavičius"    ) (September 2, 1862, Brewiki, Kovno Governorate – December 31, 1932, Kaunas, Lithuania) was a lawyer and politician, one of the twenty signatories of the Act of Independence of Lithuania and brother to the first president of Poland Gabriel Narutowicz.
 He was also the only Polish–Lithuanian member of the Taryba, the provisional Lithuanian parliament formed in the later stages of World War I.

Question: what job does Stanislaw Narutowicz's brother do before served as the 1st president of Poland?
Answer: professor of hydroelectric engineering