title: Halcyon days with Bill Arnold.
abstract: The circumstances that led to the discovery that plants luminesce after they are illuminated are described, as are other discoveries that would not have been possible were it not for the fortuitous association I had with my dear and most admirable friend, W.A. Arnold, to whom this special issue is dedicated.
authors.affiliation: University of Southern California, 90089, Los Angeles, CA, USA.
authors.forename: B L
authors.initials: BL
authors.lastname: Strehler