In answer to Steve5's question - the answer is in Anderson's book, pp. 211-212. In brief, he says the spritsail yard might be mounted to the bowsprit with either a parrel or a truss.
Texas A&M's maritime program focusses heavily on archaeology. I didn't get far into that thesis (my poor old eyes have read enough MA theses to last me the rest of my life), but it looks like a detailed description of the surviving remains of a particular shipwreck, the ship in question being much smaller than Le Soleil Royal. From the modeler's standpoint, the most interesting things in it probably are the photos of rigging fittings - blocks, deadeyes, etc. In terms of the leads of the lines, I don't think it says much that isn't in the Anderson book (which, it's worth noting, is the first book in the lady's bibliography).
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