Inspiration and Painting Progress

I'm in the middle of a new painting right now, tentatively titled, "A Boundary, Not A Thing". Here's some of the art I've been browsing in books and online for inspiration and to reference for the new painting:

James Whistler, "Nocturne: Trafalgar Square: Chelsea Snow", 1876
Source: Wikimedia Commons
Caspar David Friedrich, Monk by the Sea, 1809
Source: Wikimedia Commons via Some Landscapes Blog
James Abbott McNeill Whistler, Harmony in blue and silver: Trouville (1865)
Source: Wikimedia Commons via Some Landscapes Blog
"Moonlight on Mount Lafayette, New Hampshire," by William Trost Richards, 1873
Source: Resonant Enigma Blog

J. Alden Weir, "The Bridge: Nocturne" aka ""Queensboro Bridge", 1910
Washington Allston, "Moonlight Landscape", 1819Michael Schall, Smoke Factory Malfunction, graphite on paper, 40" x 60", 2007.
Claude-Joseph Vernet, "Night, A Port in Moonlight", 1772

(last night)(still in progress)