In 1678 Dryden accommodated with a prologue Shadwell's play of the "True Widow;" but to write these occasional pieces was part of his profession, and the circumstance does not prove that the breach between these rivals for public applause was ever thoroughly healed; on the contrary, it seems likely, that, in the case of Shadwell, as in that of Settle, political hatred only gangrened a wound inflicted by literary rivalry.