Robert Alexander Duncan

1855 - 1942  (86 years)

• Name	Robert Alexander Duncan  [1, 2]
  Birth	14 Aug 1855	Bond, Illinois, USA   [1, 2, 3, 4, 5, 6]
  Gender	Male
  Name	Robert A Duncan  [3, 6]
  Name	Robert Duncan  [4, 5]
  Residence	1860	Greenville, Bond, Illinois, USA   [4]
  Residence	1870	St Vrain, Burlington, Weld, Colorado Territory, USA   [5]
  Residence	1880	Weld, Colorado, USA   [3]
  	Occupation: Miner; Marital Status: Single; Relation to Head of House: Son
  Residence	1900	Boulder, Boulder, Colorado, USA   [2]
  	Occupation: Salesman; Marital Status: Married; Relation to Head of House: Head
  Possessions	Mar 1906	Ward, Boulder, Colorado, USA
  	Sold the Dolphin group of Mines to a NY syndicate
  Reference Number	30238
  Burial	1942	Longmont, Boulder, Colorado, USA   [1]
  Death	16 Jan 1942	Boulder, Colorado, USA   [1]
  Person ID	I30238	KLD Genealogy
  Last Modified	13 Jul 2026

  
  

  Father	Elisha Duncan,   b. 13 Sep 1822, Near Greenville, Clinton, Illinois, USA d. 3 Jul 1893, Longmont, Boulder, Colorado, USA (Age 70 years)
  Relationship	bio
  Mother	Mary Worthington Myatt,   b. 27 Mar 1832, Pocahontas, Bond, Illinois, USA d. 21 Feb 1926, Denver, Denver, Colorado, USA (Age 93 years)
  Relationship	bio
  Marriage	10 Aug 1849	Bond, Illinois, USA   [7]
  Family ID	F19944	Group Sheet  |  Family Chart

  
  

  Family	Myrtle M Wright,   b. Abt 1872
  Marriage	5 Mar 1890	Longmont, Boulder, Colorado, USA   [2, 6]
  Children	1. Ralph Duncan,   b. Jan 1891, Colorado, USA  [Father: bio]  [Mother: bio]   2. Ella Duncan,   b. Aug 1892, Colorado, USA  [Father: bio]  [Mother: bio] > 3. Lawrence Alexander Duncan,   b. 25 May 1895, Boulder, Colorado, USA d. 6 Mar 1989 (Age 93 years)  [Father: bio]  [Mother: bio]   4. Robert Duncan,   b. Aug 1899, Colorado, USA  [Father: bio]  [Mother: bio]
  Family ID	F19943	Group Sheet  |  Family Chart
  Last Modified	13 Jul 2026

  
  

• Event Map

  Birth - 14 Aug 1855 - Bond, Illinois, USA Residence - 1860 - Greenville, Bond, Illinois, USA Residence - 1870 - St Vrain, Burlington, Weld, Colorado Territory, USA Residence - Occupation: Miner; Marital Status: Single; Relation to Head of House: Son - 1880 - Weld, Colorado, USA Marriage - 5 Mar 1890 - Longmont, Boulder, Colorado, USA Residence - Occupation: Salesman; Marital Status: Married; Relation to Head of House: Head - 1900 - Boulder, Boulder, Colorado, USA Possessions - Sold the Dolphin group of Mines to a NY syndicate - Mar 1906 - Ward, Boulder, Colorado, USA Burial - 1942 - Longmont, Boulder, Colorado, USA Death - 16 Jan 1942 - Boulder, Colorado, USA  = Link to Google Earth

  
  

• Documents » Slide Show	3 Documents
  	Sued for Excessive Fees - Guy D Duncan Boulder Daily Camera - November 8, 1906, Courtesy of ColoradoHistoricNewspapersArchive.com
  	Mining Litigation - Duncans' Bond Hearing The Boulder County Miner Volume 1, Number 34 — Courtesy of Colorado Historic Newspapers Collection
  	Robert Duncan Sells Dolphin Mines Boulder Daily Camera, Volume 16, Number 13 - Colorado Historic Newspapers Collection

  
  

• Sources

  [S19] Ancestry.com, U.S., Find A Grave Index, 1600s-Current, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT, USA; Date: 2012;). https://www.findagrave.com/memorial/60880781/robert-alexander-duncan [S22] Ancestry.com, 1900 United States Federal Census, (Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date: 2004;), Year: 1900; Census Place: Boulder, Boulder, Colorado; Roll: 121; Page: 31; Enumeration District: 0160. 1900 United States Federal Census Year: 1900; Census Place: Boulder, Boulder, Colorado; Roll: 121; Page: 31; Enumeration District: 0160 [S53] Ancestry.com and The Church of Jesus Christ of Latter-day Saints, 1880 United States Federal Census, (Name: Ancestry.com Operations Inc; Location: Lehi, UT, USA; Date: 2010;), Year: 1880; Census Place: Weld, Colorado; Roll: 93; Page: 500c; Enumeration District: 110. 1880 United States Federal Census Year: 1880; Census Place: Weld, Colorado; Roll: 93; Page: 500c; Enumeration District: 110 [S55] Ancestry.com, 1860 United States Federal Census, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT, USA; Date: 2009;), The National Archives in Washington D.C.; Record Group: Records of the Bureau of the Census; Record Group Number: 29; Series Number: M653; Residence Date: 1860; Home in 1860: Bond, Illinois; Roll: M653_156; Page: 156; Family History Library Film: 803156. 1860 United States Federal Census The National Archives in Washington D.C.; Record Group: Records of the Bureau of the Census; Record Group Number: 29; Series Number: M653; Residence Date: 1860; Home in 1860: Bond, Illinois; Roll: M653_156; Page: 156; Family History Library Film: 803156 [S59] Ancestry.com, 1870 United States Federal Census, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT, USA; Date: 2009;), Year: 1870; Census Place: St Vrain, Weld, Colorado Territory; Roll: M593_95; Page: 503A. 1870 United States Federal Census Year: 1870; Census Place: St Vrain, Weld, Colorado Territory; Roll: M593_95; Page: 503A [S741] Ancestry.com, Colorado, County Marriage Records and State Index, 1862-2006, (Name: Ancestry.com Operations, Inc.; Location: Lehi, UT, USA; Date: 2016;). Colorado, County Marriage Records and State Index, 1862-2006 [S1534] Ancestry.com, Illinois, Compiled Marriages, 1791-1850, (Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date: 1997;).