I find him mentioned in:
Harvest Siftings II
Olin R. Moyle's appeal case against Watchtower et al
Trow's New York City Directory vol. XCIV. for the year ending May 1, 1881 he is listed
Blunden Simon O. clerk, h 443 E. 80th
Same listing for the New York Public Library color scan (better quality).
He wrote in to a news paper to publish a challenge:
- The evening world. (New York, N.Y.), 14 Aug. 1894. Chronicling America: Historic American Newspapers. Lib. of Congress. <http://chroniclingamerica.loc.gov/lccn/sn83030193/1894-08-14/ed-3/seq-4/>
He then bumped up the challenge prize from $50 to $100!
- The evening world. (New York, N.Y.), 11 Sept. 1894. Chronicling America: Historic American Newspapers. Lib. of Congress. <http://chroniclingamerica.loc.gov/lccn/sn83030193/1894-09-11/ed-3/seq-4/>
The Insurance Press No. 1,062 - Vol. XLII New York, Wednesday, January 12, 1916 pg 15 under New Jersey lists the payout from his life insurance policy at the time of his death.
Bloomfield: Simon O. Blunden.. 2,258