Question: Who wrote both the literary fairy tails "The Snowman", and "The Fir-Tree"?

Context articles: The Pig King
The Fir-Tree
The Steadfast Tin Soldier
Fairy Gifts
List of fairy tales
The Benevolent Frog
Chevalier de Mailly
Fairer-than-a-Fairy (Mailly)
Histoires ou contes du temps passé
The Snowman (fairy tale)

The Pig King is an Italian literary fairy tale written by Giovanni Francesco Straparola in his "The Facetious Nights of Straparola".
 Madame d'Aulnoy wrote a French, also literary, variant, titled Prince Marcassin.
"The Fir-Tree" (Danish: "Grantræet") is a literary fairy tale by the Danish poet and author Hans Christian Andersen (1805–1875).
 The tale is about a fir tree so anxious to grow up, so anxious for greater things, that he cannot appreciate living in the moment.
 The tale was first published 21 December 1844 with "The Snow Queen", in Copenhagen, Denmark, by C.A. Reitzel.
 One scholar (Andersen biographer Jackie Wullschlager) indicates that "The Fir-Tree" was the first of Andersen's fairy tales to express a deep pessimism.
"The Steadfast Tin Soldier" (Danish: "Den standhaftige tinsoldat") is a literary fairy tale by Hans Christian Andersen about a tin soldier's love for a paper ballerina.
 After several adventures, the tin soldier perishes in a fire with the ballerina.
 The tale was first published in Copenhagen by C.A. Reitzel on 2 October 1838 in the first booklet of "Fairy Tales Told for Children.
 New Collection."
 The booklet consists of Andersen's "The Daisy" and "The Wild Swans".
 The tale was Andersen’s first not based upon a folk tale or a literary model.
 "The Steadfast Tin Soldier" has been adapted to various media including ballet and animated film.
Fairy Gifts (in French : "Les Dons") is a French literary fairy tale, by the Comte de Caylus (1692–1765).
 Andrew Lang included it in his "The Green Fairy Book" (1892 ; this is a reworked version).
Fairy tales are stories that range from those originating in folk lore to more modern stories defined as literary fairy tales.
 A modern definition of the fairy tale, as provided by Jens Tismar's monologue in German, is a story that differs "from an oral folk tale"; written by "a single identifiable author"; can be characterised as "simple and anonymous"; and exists in a mutable and difficult to define genre with a close relationship to folktales.
The Benevolent Frog or The Frog and the Lion Fairy is a French literary fairy tale, written by Madame d'Aulnoy.
 Andrew Lang included it in "The Orange Fairy Book".
The courtesy title chevalier de Mailly is accorded in France to a younger brother of the marquis or the comte de Mailly in each generation.
 Though several have carried the designation, the celebrated Jean, chevalier de Mailly (-?
1724)— possibly a brother of Louis II de Mailly (1662-1699), comte de Mailly, Lords of Rubempré, seigneur de Rieux, seigneur d'Haucourt— was the author of literary fairy tales, imaginary adventures, racy novels and romances, often published anonymously by necessity, sometimes published outside France.
 Departing from the formulas established by Mme d'Aulnoy, he introduced magic and marvels in his fairy tales to entertain his readers and bring his gallant lovers together.
 His fairy tales have often been reprinted and collected.
Fairer-than-a-Fairy (French "Le Prince Arc-en-ciel", The Rainbow Prince) is a literary fairy tale published anonymously in the 1718 fairy tale collection "Nouveaux contes de fées".
 It is attributed to the Chevalier de Mailly.
 Andrew Lang included it in "The Yellow Fairy Book".
Histoires ou contes du temps passé or Les Contes de ma Mère l'Oye (Stories or Fairy Tales from Past Times with Morals or Mother Goose Tales) is a collection of literary fairy tales written by Charles Perrault, published in Paris in 1697.
 The work became popular because it was written at a time when fairy tales were fashionable amongst aristocrats in Parisian literary salons.
 Perrault wrote the work when he retired from court as secretary to Jean-Baptiste Colbert, minister to Louis XIV of France.
 Colbert's death may have forced Perrault's retirement, at which point he turned to writing.
 Scholars have debated as the origin of his tales and whether they are original literary fairy tales modified from commonly known stories, or based on stories written by earlier medieval writers such as Boccaccio.
"The Snowman" is a literary fairy tale by Hans Christian Andersen about a snowman who falls in love with a stove.
 It was published by C.A. Reitzel in Copenhagen as "Sneemanden" on 2 March 1861.
 Andersen biographer Jackie Wullschlager describes the tale as a lyrical and poignant complement to Andersen's "The Fir-Tree" of December 1844.