Some time ago, I asked whether 'Harlow' was actually Don Wilson's middle name and no one seemed certain.
I've been doing some checking on ancestry.com (as much as I can do for free) and did a search.
There's a Donald H. Wilson listed in the 1910 census for Denver, age 9, born to Lincoln and Charlotte L. Wilson (a Carrie Hatch lived in the same house). Don was born in late 1900 and thus would have been nine at the time of the census.
And the only Don Wilson who died in California in 1982 is a Don H. Wilson.
So, I think it's pretty safe to assume Don's middle name actually was Harlow, especially considering this note: http://vvl.lib.msu.edu/record.cfm?recordid=1219
Yhtapmys