Sources:

1.  Index New York State 1855 Census, Cattaraugus County, Town of Allegany (online at the Cattaraugus County NYGenWeb site; extracted by Art Burch & Laura Green from LDS microfilm — page numbers added by LDS during filming):

Name	Household	Family	Page
Sias, Daniel	244	250	72

2.  LDS.  Family Search: Internet Genealogy Service: International Genealogical Index (IGI).

Daniel SIAS Birth: 5 May 1822, Rushville, Nates (sic), New York Father: Nathaniel SIAS; Mother: Hannah JONES Source: LDS sealings/endowments for the dead... [i.e., patron submission]

3.  Obituary of Daniel Sias, transcribed and posted by Garey Marshall at his web site (see next source).  He cites as source:  "July 12, 1904, Portville, NY newspaper, Pittsburgh, Pennsylvania."

Daniel Sies, an aged resident of this Village, passed away at his home on Brooklyn St. Monday afternoon shortly before 4 o'clock, death resulting from causes incident to old age.  Deceased was 85 years of age. Mr Sies was born in Rushville, Yates Co., NY, where he spent his boyhood.  Later he lived for several years in Pittsburgh, where he learned the trade of carpenter and tinsmith.  He enlisted in Co. I, 64th NY Vol. Regt. and served with distinction, taking part in several important engagements, among them being the battles of Chancellorsville, Fredricksburg, Ashby's, and Snickers Gap.  Since the close of the war he had lived in Portville with the exception of a very few years.  He had worked at the trade of tinsmith, have been employed for a considerable period of the hardware firm of F.S. Persing and Co.  His advanced age has compelled him to give up work during recent years, though he had been able to be about town until a few weeks before his death, which coming to his family as a severe blow, was not unlooked for.  He is survived by his aged wife, two sons, Charles Sies of Portville and Frank of Harriman, TN, and one step-son, Fred Giddings of Bellrun.  No brothers or sisters survive, he being the last of a large family.  The funeral was held Wednesday morning at 11 o'clock at the house, the service being in charge of Rev. F. Rouls and Rev. John Seywalt. The interment took place in Chestnut Hill Cemetery.

If Daniel really was born 5 May 1822, then he was 82 years old when he died, not 85.

4.  Descendants of John Sias Sr. by Garey L. Marshall.