Compare Latin scenarius.

scenary

1. Obsolete spelling of scenery
   • 1695, John Dryden, “Preface of the Translator, with a Parallel, of Poetry and Painting”, in C[harles] A[lphonse] du Fresnoy, De Arte Graphica. The Art of Painting, […], London: […] J[ohn] Heptinstall for W. Rogers, […], →OCLC ↗, page xliv ↗:

     To make a Sketch, or a more perfect Model of a Picture, is in the Language of Poets, to draw up the Scenary of a Play, and the reaſon is the ſame for both; to guide the Undertaking, and to preſerve the Remembrance of ſuch things, whoſe Natures are difficult to retain.