to him, such as "always crescendo to a high note", but that he was concerned with expressive phrasing, rhythmic consistency and sensitive colouring. Berlioz wrote in 1853 that Chopin "has created a kind of chromatic embroidery ... whose effect is so strange and piquant as to be impossible to describe ... virtually nobody but Chopin himself can play this music and give it this unusual turn". Hiller wrote that "What in the hands of others was elegant embellishment, in his hands became a colourful wreath of flowers." Chopin's music is frequently played with rubato, "the practice in performance of disregarding strict time, 'robbing' some note-values for expressive effect". There are differing opinions as to how much, and what type, of rubato is appropriate for his works. Charles Rosen comments that "most of the written-out indications of rubato in Chopin are to be found in his mazurkas ... It is probable that Chopin used the older form of rubato so important to Mozart ... [where] the melody note in the right hand is delayed until after the note in the bass ... An allied form of this rubato is the arpeggiation of the chords thereby delaying the melody note; according to Chopin's pupil Karol Mikuli, Chopin was firmly opposed to this practice." Friederike Müller, a pupil of Chopin, wrote: "[His] playing was always noble and beautiful; his tones sang, whether in full forte or softest piano. He took infinite pains to teach his pupils this legato, cantabile style of playing. His most severe criticism was 'He—or she—does not know how to join two notes together.' He also demanded the strictest adherence to rhythm. He hated all lingering and dragging, misplaced rubatos, as well as exaggerated ritardandos ... and it is precisely in this respect that people make such terrible errors in playing his works." Polish heritage With his mazurkas and polonaises, Chopin has been credited with introducing to music a new sense of nationalism. Schumann, in his 1836 review of the piano concertos, highlighted the composer's strong feelings for his native Poland, writing that "Now that the Poles are in deep mourning [after the failure of the November Uprising of 1830], their appeal to us artists is even stronger ... If the mighty autocrat in the north [i.e. Nicholas I of Russia] could know that in Chopin's works, in the simple strains of his mazurkas, there lurks a dangerous enemy, he would place a ban on his music. Chopin's works are cannon buried in flowers!" The biography of Chopin published in 1863 under the name of Franz Liszt (but probably written by Carolyne zu Sayn-Wittgenstein) states that Chopin "must be ranked first among the first musicians ... individualizing in themselves the poetic sense of an entire nation." Some modern commentators have argued against exaggerating Chopin's primacy as a "nationalist" or "patriotic" composer. George Golos refers to earlier "nationalist" composers in Central Europe, including Poland's Michał Kleofas Ogiński and Franciszek Lessel, who utilised polonaise and mazurka forms. Barbara Milewski suggests that Chopin's experience of Polish music came more from "urbanised" Warsaw versions than from folk music, and that attempts (by Jachimecki and others) to demonstrate genuine folk music in his works are without basis. Richard Taruskin impugns Schumann's attitude toward Chopin's works as patronising and comments that Chopin "felt his Polish patriotism deeply and sincerely" but consciously modelled his works on the tradition of Bach, Beethoven, Schubert, and Field. A reconciliation of these views is suggested by William Atwood: "Undoubtedly [Chopin's] use of traditional musical forms like the polonaise and mazurka roused nationalistic sentiments and a sense of cohesiveness amongst those Poles