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'''Francis Langford O'Callaghan''' Sir(1839-1909)

Appointed to the Biography from Institution of Civil Engineers "Biographical Dictionary of Civil Engineers in Great Britain and Ireland - Furnivall, Willoughby Charles" *1862-66, [[Public Works Department]](PWD), 1862, appointed Probationary Assistant Engineerand posted to the Northern road and related bridge works <ref name=biog>[http://www.icevirtuallibrary.com/doi/abs/10.1680/bdoceigbai.58347.457 Institution of Civil Engineers "Biographical Dictionary of Civil Engineers in Great Britain and Ireland - O'Callaghan, Central ProvincesFrancis Langford "]; Retrieved on 9 Jul 2016</ref>.*1866, Promoted to PWD Executive Engineer, 1866 <ref name=name>[https://play.google.com/books/reader?id=b2NPAAAAMAAJ&printsec=frontcover&output=reader&hl=en_GB&pg=GBS.PA575 Google Books " India List and India Office List, 1905" page 575 (pdf page 538)] Retrieved on 21 May 9 Jul 2016</ref>.

<ref name=name/>.*1870, Transferred to [[Public Works Department]] Railway Branch, 1870, and served as Engineer-in-Chief of various railway surveys<ref name=name/>. *1871 Feb, joined the [[State Railways]] system, by this time as Executive Engineer <ref name=biog/>. *1871, first posted to Nagpur & Raipur railway survey railway survey <ref name=biog/> (''Nagpur - must be the'' [[Nagpur Chhattisgarh Railway]] ''which opened in 1871; Raipur - survey not identified'')*1872-75, [[Wardha Valley Railway]] construction works <ref name=biog/>.*1877-79, [[Tirhoot State Railway]], Chief Engineer <ref name=biog/>.*1879-83, [[Punjab Northern State Railway]], construction of the [[Rawalpindi]]-[[Peshawar]] section that included the [[Attock Bridge]] over the Indus River <ref name=biog/>. Promoted to Superintending Engineer, 1880<ref name=name/>.*1884-85, [[Sind-Sagar Railway]] survey <ref name=biog/>.*1885-86, [[Bolan Pass Railway Construction]], Engineer-in-Chief, a strategic line constructed on Government orders *1887, Khwaja Amran railway survey for [[North Western Railway|North Western State Railway (NWR)]] <ref name=biog/> ''(This would be part of the survey which included the [[Khojak Tunnel]] and the extension of the line to the Afghan border at [[Chaman]])''<ref>[http://dsal.uchicago.edu/reference/gazetteer/pager.html?objectid=DS405.1.I34_V21_020.gif "The Imperial Gazetteer of India" v. 21, p. 14.]; Retrieved on 9 Jul 2016</ref>.*1887-89, [[Khojak Tunnel]] and [[Chaman]] extension <ref name=biog/> for [[North Western Railway|North Western State Railway (NWR)]] *1889, Promoted to Chief Engineer, 1889<ref name=name/>.*1889, [[State Railways]] appointed Chief Consulting Engineer to Government of India for State Railways, 1899Railway <ref name=biog/><ref name=name/>. *1892-94, Secretary to the Government of India, Public Works Department, 1894<ref name=biog/>.*1894, Retired, 1894<ref name=biog/> <ref name=name/>.

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