- Mentioned in the Diary Log of Dr J. Welsh.
- He seems to be working in league with Dr Welsh against Dr Horn.
- Dr Stone is the in-game alias for Anthony "OnboardError" Stone, a level designer on Black Mesa.
- OnboardError has a personal website at http://www.onboarderror.com/ (which is hosted on the same server as http://www.thestormseeker.com/). However, nothing ARG-related has so far been found on the site.
- A few posts OnboardError has made in the forum thread seem to indicate that he was involved in the placement of the hidden pizzas and Biodome Complex insignias in Black Mesa.   
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