Found by English Heritage at Brooke House in Hackney, the document from which this pattern was drawn is identified as 1920s in origin, notably because of the way it had been printed: a ‘gravure’ technique, which only became commercially viable after the turn of the last century. 

In fact, the design is likely to have been copied from a much earlier paper and the five colourways have been made using the rather more painterly, textural surfaceprint technique which is more typical of the older, original wallpaper