I continue to be astonished by the research that’s possible on the Net. I’ve been reading, on computer, a pdf of a rare book, Racine et Voisin, that I was able to download from the Internet Archive
The author quotes an entry in Registre de La Grange. La Grange worked for Molière’s troupe, and dutifully recorded daily tallies (and much else). The date given for the entry in Racine et Voisin seemed wrong according to my notes. A short Net search revealed that La Grange’s notes were available on Open Library ? a searchable version, no less, and I was quickly able to verify my suspicions.  
There is a wealth of information in La Grange’s notes. With respect to this particular event, Molière’s troupe had invested a considerable amount in producing the young and aspiring playwright Jean Racine’s tragedy, Alexander, and were thus ? according to La Grange’s note ? rather surprised to discover that the same play was also being performed by a rival theatrical troupe … and that this had been Racine’s doing.  
Jean Racine (see image above) was a genius, a writer of great power, but he was also, to be blunt, a rat. 

To see Registre de La Grange, go to: http://bit.ly/LaGrangeRegister (You may have to join Open Library, first.)
To see Racine et Voisin by Marc de Monifaud, go to: http://bit.ly/Racine_et_Voisin

Website: http://www.sandragulland.com/
Blog: http://sandragulland.blogspot.com/
Facebook: http://tinyurl.com/3xzbgv
Twitter: http://twitter.com/Sandra_Gulland