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- [S1] Wikipedia Contributors, Wikipedia: The Free Encyclopedia, "Michael Collins (Irish leader)," https://en.wikipedia.org/wiki/Michael_Collins_(Irish_leader), (San Francisco, CA: Wikimedia Foundation, Inc.).
- [S2] General Register Office, Michael Collins, Birth Certificate No. 36, 16 Oct 1890, Woodfield, Clonakilty Registration District, County Cork, Ireland.
- [S3] National Library of Ireland, Ireland, Catholic Parish Registers, 1655-1915 [database on-line], (Provo, UT, USA: Ancestry.com Operations, Inc., 2016).
- [S5] General Register Office, Margaret Collins, Birth Certificate No. 403, 18 Aug 1876, Woodfield, Clonakilty Registration District, County Cork, Ireland.
- [S6] General Register Office, John Collins, Birth Certificate No. 327, 28 May 1878, Woodfield, Clonakilty Registration District, County Cork, Ireland.
- [S7] General Register Office, Mary Collins, Birth Certificate No. 456, 1 Jul 1881, Woodfield, Clonakilty Registration District, County Cork, Ireland.
- [S8] General Register Office, Johanna Collins, Birth Certificate No. 143, 17 Dec 1879, Woodfield, Clonakilty Registration District, County Cork, Ireland.
- [S9] General Register Office, Ellen Collins, Birth Certificate No. 27, 12 May 1883, Woodfield, Clonakilty Registration District, County Cork, Ireland.
- [S10] General Register Office, Patrick Collins, Birth Certificate No. 15, 23 Sep 1884, Woodfield, Clonakilty Registration District, County Cork, Ireland.
- [S11] General Register Office, Catherine Collins, Birth Certificate No. 28, 28 Aug 1887, Woodfield, Clonakilty Registration District, County Cork, Ireland.
- [S12] General Register Office, Michael Collins and Maryanne O'Brien, Marriage Certificate No. 88, 26 Feb 1876, Rosscarberry, Clonakilty Registration District, County Cork, Ireland.
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