I couldn’t locate anyone who is actively researching Henry but I did find some interesting items on Familysearch.org as follows:
Henry William Suit is located on Compact Disc 65 of the pedigree resource file by Sharon Reichman Keys 1212 Robin Cove Tulepo, MS. She locates marriage of Phoebe Hewitt in Terre Haute(Vigo county) Indiana but no date. She claims a dob as 2 Aug 1805. She may have added documentation. A local Family History center may have the CD referred to or it can be ordered for a small fee.
Your article says Henry has a proof of dob. I am curious what that could be. Birthdates that early are rarely supported by government documents but could be by a testimonial affidavit in a probate, guardianship or other legal case. It is more likely he had a family bible. If he had military service his birthdate could be recorded on a service record but that would be his opinion. The census records so far found are consistent with the 1826 date of birth and no other Henry’s show up on the usual census searches. In each of these cases except perhaps guardianship, Henry himself was the likely informant and therefore inconsistencies are his alone.
A peculiar record on the IGI(International genealogical Index) claims an extracted marriage between Susan Suit and Henry Suit on 01 Sept 1876 in Council Bluffs. Susan Suit may be the widow of James Suit as she and James are found together in 1870 and she is once again a widow in 1880. This marriage date could be searched locally in county records and newspapers.
I searched for a surname compilation in the Family History Library and found only one that came close to a match. It is a collection of various records on the family Soots(also spelled Suit, Suits, Suitz some of whom lived in Indiana. It has been microfilmed (FHL 1145784) and could be borrowed through your closest Family history center.
I am somewhat mystified by your reference to newspaper clippings. You state that one of his children received a newspaper clipping about 1908 which said he was 105. I take it that you go on to extract the text of the article in the Oct 30. Telegraph Herald in Dubuque which quotes an article the original of which may have appeared in a Council Bluffs paper. You do not state whether a search has been made of this or other papers for reference to Henry or George or whether you are basing your information on the actual clipping or a transcription of the clipping.
The wonderful thing about Iowa genealogy is that so many of the newspapers have been preserved on microfilm which available on interlibrary loan. At minimum a search of Council Bluff papers is indicated.
As to Henry’s claim of age, I think it may be true that he could read without glasses. But I think it may be unlikely that he retained all his faculties.