Question: Where did Van Gogh get his first art supplies?
About the article "Sien (Van Gogh series)", section "Reaction to his relationship with Sien".

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Due to his relationship with Sien, van Gogh experienced the loss of support and goodwill from family and friends, and he experienced an even more strained relationship with his parents.
His teacher and cousin-in-law, Anton Mauve, abruptly ceased his support and tutelage of van Gogh within a few short weeks of van Gogh first meeting Sien, although there were other factors involved as well, not least their mutual melancholy.
Hulsker called this a simple tragedy for van Gogh.
Likewise, a long-standing family friend, Hermanus Tersteeg, an influential art dealer who taught van Gogh and his brother Theo a great deal about art and literature, and who gave van Gogh his first set of art supplies when he decided to become an artist, although he was always somewhat equivocal in his support, abruptly withdrew at the same time.
Van Gogh's relationship with Mauve in truth had scarcely lasted a month.
Already by the end of January, van Gogh was writing his brother Theo that he did not always find it easy to get on with Mauve.
Shortly after this, they fell out with each other over an issue involving drawing from plaster casts, which Mauve was anxious van Gogh should undertake to perfect his technique.
Van Gogh, however, vehemently insisted on drawing from models, and in a fit of pique destroyed some plaster casts of hands and feet that Mauve had given him to make studies from.
Following that incident, Mauve said he would have nothing more to do with him for the next two months (i.e.
for the rest of the winter).
In reality, Mauve, had resolved to break with van Gogh completely.
Van Gogh initially blamed Tersteeg for Mauve's indifference, but a chance meeting with Mauve in May made it clear to him that Mauve had definitively broken with him.
He described the meeting in a letter to Theo, and in the same letter he revealed his relationship with Sien for the first time and passionately defended it:Van Gogh left Sien the autumn of 1883.
Van Gogh went to Drenthe to paint and Sien went back to work as a seamstress, charwoman and possibly as a prostitute.
Her children, Maria and Willem, lived with Sien's mother and brother Pieter.
In 1901 Sien married a seaman, Anton van Wijk.
She committed suicide in 1904 at the age of 54 in Rotterdam's harbor, 14 years after van Gogh's death.
In 1880 when he was 27 years-old, Van Gogh decided to become an artist.
In October of that year he moved to Brussels and began a beginner's course of study.
Van Gogh returned to Etten in April 1881 to live with his parents and studied art on his own.
His younger brother Theo, an art dealer at the main branch of Goupil & Cie, encouraged him and started covering Van Gogh's expenses.
Van Gogh used images from illustrated magazines to teach himself how to draw.
Charles Bargue, a French artist, wrote two books on drawing that were a significant source of study for Van Gogh.
Both written in 1871, one is "Cours de dessin" and the other "Exercises au fusain pour préparer à l’étude de l’académie d’après nature," Van Gogh created copies of the drawings or adapted nude images for clothed depictions.
In January 1882, he settled in The Hague where he called on his cousin-in-law, the painter Anton Mauve (1838–88).
Mauve introduced him to painting in both oil and watercolor and lent him money to set up a studio.
Van Gogh began drawing people from the working poor, including the prostitute Clasina Maria "Sien" Hoornik (1850–1904, with whom he would become involved.
Van Gogh dreamed his studio would one day become a form of respite for the poor where they could receive food, shelter and money for posing.
His work was not well received; Mauve and H.G.
Tersteeg, manager of Goupil & Cie, considered the drawings coarse and lacking charm.
Van Gogh likened the subjects "unrefined" characteristics of his drawings to harsh "yellow soap" made of lye.
Van Gogh's relationship with Sien changed as they lived together with Maria, her five-year-old daughter, to the great disappointment of his family.
Mauve appears to have suddenly gone cold towards Van Gogh and did not return a number of his letters, Van Gogh supposed that Mauve did not approve of his domestic arrangement with Sien and her young daughter.
Van Gogh created a number of drawings of Sien and her daughter.
Having ended his relationship with Sien, Van Gogh moved to Drenthe in September 1883 and painted landscapes.
Three months later, he moved back in with his parents, who were at that point living in Nuenen.
In 1884, Van Gogh created the weaver series, works of rural life and landscapes.
For a brief period of time, he gave painting lessons in Eindhoven.
Near the end of the year, Van Gogh began experimenting with complementary colors, influenced by the color theories of Charles Blanc.
Vincent made many studies of peasants in 1885, culminating in his first major painting, "The Potato Eaters."
In his works, Van Gogh used particularly somber colors and colors mixed with black, which he felt was like that of 17th-century masters, such as Frans Hals.
His brother, Theo van Gogh (art dealer) had asked him often to lighten up his work, referring to the work of the Impressionists.
Once Van Gogh went to Paris, he did open up his palette to color and light and admitted that his works from this period were old-fashioned.
Theodorus van Gogh, Vincent's father, died March 26, 1885.
In November, Vincent moved to Antwerp. 
Copies by Vincent van Gogh, form an important group of paintings executed by Vincent van Gogh between 1887 and early 1890.
While at Saint-Paul asylum in Saint-Rémy-de-Provence, France where Van Gogh admitted himself, he strived to have subjects during the cold winter months.
Seeking to be reinvigorated artistically, Van Gogh did more than 30 copies of works by some of his favorite artists.
About twenty-one of the works were copies after, or inspired by Jean-François Millet.
Rather than replicate, Van Gogh sought to translate the subjects and composition through his perspective, color, and technique.
Spiritual meaning and emotional comfort were expressed through symbolism and color.
His brother Theo van Gogh (art dealer) would call the pieces in the series some of his best work. 
In 1886 Van Gogh left Holland for Paris never to return.
His brother Theo, a successful Parisian art dealer, provided Van Gogh the support and connections for an immersion in modern art.
In Holland Van Gogh was influenced by great Dutch masters as well as Anton Mauve a Dutch realist painter who was a leading member of the Hague School.
Mauve was a significant early influence on his cousin-in-law Vincent van Gogh.
Starting March, 1886 Van Gogh studied with Fernand Cormon.
During that time he lived with his brother Theo who leased a large apartment on Rue Lepic in Montmartre with space for a studio for Van Gogh.
Three months later Van Gogh abandoned his studies with Cormon, but his education continued as he met local artists.
During 1886 he was introduced to Impressionist artists and their works, such as Edgar Degas, Claude Monet, Auguste Renoir, Georges Seurat and Paul Signac.
In 1887 Van Gogh continued to make important connections with other artists who he befriended and exchanged paintings with, such as Louis Anquetin, Émile Bernard, Armand Guillaumin, Lucien Pissarro and Paul Signac.
Having been introduced to Impressionism and Pointillism in Paris, Van Gogh began experimenting with related techniques, first on a series of self-portraits before he moved on to larger, more complex compositions.
Many of the Impressionist artists also shared his interest in Japanese wood block prints.
The works of Japanese print makers, Hiroshige and Hokusai greatly influenced Van Gogh, both for the beautiful subject matter and the style of flat patterns of colors, without shadow.
Van Gogh arranged an exhibit in Paris of Japanese prints at Café du Tambourin.
In the two years, from 1886 through 1888, Van Gogh emerged as a sophisticated, thoughtful and provoking artist.
It is through association with artists in Paris that Van Gogh began to dream of a utopian artists community where "like-minded" individuals would realize "the perfect art."
Van Gogh did not have a close relationship with his oldest sisters or Cornelius his youngest brother.