the work titled double falsehood was presented by lewis theobald in the 18th century as an adaptation of a shakespeare play about a spanish nobleman 's ignoble pursuit of two women .
theobald , a known scholar of shakespeare , mounted his play at drury lane theatre in london on december 13 , 1727 , claiming that it was a re-working of an original by the bard and that he had three original texts .
his claims were greeted with widespread scepticism in the eighteenth century .
but a new study of its language to build up a psychological profile of the writer ` strongly identifies ' the legendary playwright as the true author .