Question: Which French artist produced the cover artwork for the EP Stone, Wind and Pillor by the American metal band Agalloch?

Context paragraphs:
The Grey (Agalloch EP): The Grey is the third EP by American metal band Agalloch.  It was released by Vendlus Records on February 29, 2004, in a limited run of 1,000 copies.  The two songs on "The Grey" are reinterpretations of two tracks from "The Mantle" album.  This EP is part of a dichotomy, completed by "The White" EP.

Of Stone, Wind and Pillor: Of Stone, Wind and Pillor is an EP by American metal band Agalloch.  It was originally meant to be released on 7" vinyl in December 1998 by Iron First Productions (with only the first three songs), but that did not occur.  It was later released in 2001 via The End Records with two additional tracks: "Kneel to the Cross", recorded in 2001, and "A Poem by Yeats", recorded in 2000.  This release was limited to 2,500 copies.  The cover artwork, "Le Cerf Se Voyant Dans L'Eau", was by Gustave Doré.

Faustian Echoes: Faustian Echoes is an EP by American metal band Agalloch, released on June 26, 2012 by Agalloch's own label Licht von Dämmerung Arthouse.  It is actually a single, two-part song over 21 minutes in length, making it the longest song Agalloch has ever written.  The song is based on Johann Wolfgang von Goethe’s play "Faust".

The Demonstration Archive: The Demonstration Archive 1996 - 1998 is a compilation album by Agalloch featuring music from the band's unsigned years from 1996 to 1998.  Tracks 1 through 3 were taken from Agalloch's first demo from 1997, "From Which of This Oak"; tracks 4 through 6 were from an unreleased 7" vinyl EP recorded in autumn 1998 called "Of Stone, Wind and Pillor" (later released as a limited-edition CD with bonus tracks by The End Records); and tracks 7 and 8 came from Agalloch's second demo "Promo 1998".

The Silence of Forgotten Landscapes: The Silence of Forgotten Landscapes is a 2009 live DVD by American metal band Agalloch.  It features a 2008 performance by the band at the Biebob venue in Vosselaar, Belgium.  It was co-directed by Juan Mosqueda and Agalloch frontman John Haughm.

The White (EP): The White is an EP by American metal band Agalloch, released on February 29, 2008.  A follow-up to Agalloch's 2004 EP "The Grey", it completed a dichotomy of releases for Vendlus Records.  "The White" contained seven neofolk and dark ambient tracks written and recorded between 2004 and 2007.  The release was limited to 2000 copies.

Tomorrow Will Never Come: Tomorrow Will Never Come is a 2003 EP by American metal band Agalloch.  It was released by The End Records in a limited edition of 500 copies, hand-initialed by bassist Jason William Walton.

Pale Folklore: Pale Folklore is the debut album by American metal band Agalloch.  It featured an eclectic mix of acoustic folk reminiscent of Scandinavian bands such as Ulver; doom and black metal-esque riffs; growled, clean, whispered, and shrieked vocals; and a production style and atmosphere that borrowed heavily from black metal.  The lyrical themes focused mainly on depression, nature, folklore and the supernatural.  It featured the roots of a post-rock influence which was greatly expanded on with Agalloch's second studio album, "The Mantle".

Gustave Doré: Paul Gustave Louis Christophe Doré ( ; ] ; 6 January 1832 – 23 January 1883) was a French artist, printmaker, illustrator and sculptor who worked primarily with wood engraving.

Agalloch / Nest: Agalloch / Nest is a split EP by American metal band Agalloch and Finnish neofolk band Nest.  It was released on August 2, 2004 by The End as a 10" picture disc limited to 1,000 copies.

Supporting paragraphs: Of Stone, Wind and Pillor Gustave Doré
Answer: Gustave Doré