The fifth mood-room  in “The Palace of Art” places the pastoral landscape in the  context of human scale, productivity and consumption. Whereas  the previous stanza all but removes humanity from the meditation on the  land and sky, the description of “reapers at their sultry toil”  folds in not only the reapers as characters in the scene but also the  implied pressures and demands of industrialized civilization on the  landscape and urban residents. The “upland, prodigal in oil”  looms large over the fertile fields and introduces an anticipated conflict between urbanity and the pastoral.
          
 The farmer at work in the fields or tending to a flock is a staple of  Romantic literature and artwork. John Dawson Watson's 1862 sketch Oft  did the Harvest to the Sickle yield illustrates a line from Thomas Gray's 1751 poem “Elegy Written in a  Country Churchyard” and closely reflects the scene described in “The  Palace of Art.” Gray's poem represents the beginnings of  Romanticism in the 18th  century; Tennyson and Watson's works were published 80 and over 100  years later, respectively, yet the scene endures.
          The  stanza in “The Palace of Art” begins with a straightforward  description of a pastoral scene, “The reapers at their sultry  toil./ In front they bound the sheaves. Behind/ Were  realms of upland,” that could pass as an honest Romantic passage.  The scene is complicated, however, by the parenthetical description of the uplands as “prodigal in oil.” The pastoral  lifestyle represented in the foreground suddenly faces its imminent  takeover by the industrialization that lurks under the very hills  that surround the farm. One can imagine the hills in Oft  did the Harvest to the Sickle yield being  filled with oil and the implications that oil holds for the horse  that currently collects the hand-cut sheaves.
          A  viewer of Watson's sketch cannot know whether the hills in the  background are “prodigal in oil” as the ones in “The Palace of  Art” are described. The speaker in “The Palace of Art”  contributes an exclusive knowledge of the landscape that cannot be  known to the casual observer. Yet the knowledge of the hills' oil  provides the critical turning point in an otherwise unremarkable  pastoral scene. It is that information that shatters the fantasy of  the pastoral and places the scene, which is otherwise frozen in an  idealized time, in the context of social and technological  changes—specifically, the Industrial Revolution and subsequent  modernization in society.
          “The  Palace of Art” was written and published at a time between  Romanticism and the Victorian era in England. The environments  described in its rooms reflect a sympathy for the Romantics'  appreciation of nature but the descriptions of the world also moderate admiration of the natural  world with constant reminders of industrialized modern society and  the tensions between the industrial world and the natural world. 
          The  mention of the oil below the hills, and the transformative effect  that the passing mention has on the tone and meaning of the scene,  shows the self-conscious involvement of the artist in the scene he  describes. An otherwise superficial and aesthetic reproduction of the  environment takes on an entirely different significance once the  literally underlying substance is known to the reader—in much  the same way the superficially isolated stanzas that describe the  palace's rooms take on new meaning when read in context of their  references and influences.