I am sure you've found your information by now, but if not, I have a little bit. I am researching the same line, descending from Hardy's brother, Francis Marion.
Hardy's father was William Shumaker b. abt 1800 in Virginia.[From 1850 USFC Jackson Co., TN]
Hardy's mother was Elizabeth [I have no maiden name] b. 12 Sep 1812 in Louisiana; d. 15 Mar 1901 in Tama Co., IA; buried in Helena Cemetery, Tama Co., IA. [From 1880 USFC for DeWitt Co., IL; 1895 Iowa State Census for Carroll, Tama Co., IA; Iowa Cemetery Records]
I know this was posted a long time ago, but maybe this bit of info will help someone else. Good luck in your research!