Two pieces of original artwork are open for bidding in the Comics & Comic Art Signature Auction - Chicago #7187 ending May 12, 2018 that may be of interest here.

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Alan Lee Castles Illustration Original Art (1984). This gorgeous painting by Lord of the Rings artist Alan Lee features a hooded rider that looks suspiciously like Strider. Painted many years before his reputation was cemented as the pre-eminent Tolkien artist. Produced in watercolor on heavy paper. Matted and framed out to 23" x 16" with an inner mat opening of 16" x 11". Signed and dated by Lee in pencil. In Excellent condition.

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Greg Hildebrandt and Tim Hildebrandt Smith of Wootton Major and Farmer Giles of Ham Paperback Cover Original Art (Ballantine Books, circa 1974-75). For fantasy fans, the names of Greg and Tim Hildebrandt will forever be linked to the works of fantasy author J. R. R. Tolkien, thanks to the brothers' world-famous visual interpretations of the Tolkien characters. Here, the Brothers Hildebrandt present a wonderfully whimsical scene based on J. R. R. Tolkien's story, "Farmer Giles of Ham" for what was their first published, Tolkien-inspired work. This delightful cover illustration, with its superb artistic nod to the style of classic illustrator Maxfield Parrish, captures the mood of Tolkien's ribald mock-heroic tale perfectly. "When a 'cunning, inquisitive, greedy, well-armored but not overly bold' dragon invades the kingdom, a most unwilling Farmer Giles is chosen to slay the dragon... a dragon who refuses to fight!" This fabulous piece has an image area of 12.5" x 21.5", and the art is in Excellent condition. The illustration was signed at the lower right.