Several papers by Max Kelly, including 'Elementary Observations on 2-Categorical Limits' (1989) and 'Two-Dimensional Monad Theory' (also 1989) contain a reference to: G.M. Kelly, 'Equivalences in 2-categories, representations, and biadjoints', (in preparation). I cannot find anything resembling that in the list of Kelly's publications at sciencearchive (.) org (.) au (/) fellows (/) memoirs (/) kelly (.) html , nor by googling "kelly equivalences biadjoints". Does anyone know what happened to that paper? If that paper never got published, what is the best reference for the subjects mentioned in its title? (Wikipedia and ncatlab are possibilities but surely there are more formal presentations.) Best, Keith [For admin and other information see: http://www.mta.ca/~cat-dist/ ]