That's been the problem facing this article as well.  I'd love to see this get to featured article status, but I keep running into the fact that there isn't really a whole lot of good verifiable info out there that is easily available, nor is it easy to come by a picture that is usable (though I suspect the one or two known images of him would fall under fair use).  There are a couple of  websites out there that basically regurgitate sections from McGregor's book.  There is a certain irony in the fact that a guy who labored in anonymous solitude most of his life on a project he loved dearly died destitute and is not making several other people rather wealthy...