I looked a bit harder and I've attached my proposed fix for
SmalltalkImage>>sourcesName   and SystemDictionary>>sourcesName.  (I
guess SystemDictionary is not yet deprecated,  There seems to be a
SmalltalkImage instance floating around but I'm not sure if it is in a
global or how to access it.)

I'm still not sure what to do in the case where the Sources file is
never loaded though.

Ken
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