Unless there was a written work-for-hire contract, it's going to come down to the exact nature of the relationship between Dawkin's foundation and Timonen. There is some mention of Timonen working through his own company, in which case he was not legally an employee of the foundation. If the works in question were produced under that arrangement, then without a written work-for-hire agreement the works belong to Timonen.
I myself have run into work-for-hire disputes before. Unless you're an employee or you otherwise agree
in writing to relinquish ownership of works you produce, they're yours.
http://www.copyright.gov/circs/circ09.pdf