I have not found any information on the death of your father, but at least I have seen him mentioned, but with his name misspelled as Arthur ALKEN!
If you do a search for Arthur ALKEN at www.rootsweb.com you will see what I mean.
I think that someone copied the information out of a book by Cyrus Henry Brown, BROWN GENEALOGY, Vol I, Boston, The Everett Press Co., 1915, page 166.
I have not seen the book itself, but the information I have seen copied has the marriage of Edwin AIKEN and Emily Mabbett BROWN, their 3 children, including your grandfather Charles M. AKIN (born born 5 Aug 1860 and died 3 Dec 1910), and his wife Sophia LEIDLEIN, and your father Arthur Leidlein AIKEN.
I have been looking at this family because I have a hunch, not yet verified, that Edwin AIKEN (or AKIN), your great-grandfather, was the son of Maria WARNER, the daughter of Marvin WARNER and Clarissa PUNDERSON.
If you would like more information about this, please let me know.