Around this time he started composing again, writing his "Circle of Fifths" for piano (later published as "Twelve Miniature Studies"). His "Lullaby" for string orchestra and two harps was inspired by the combination of the River Thames and the night sky, when he saw "dark clouds drifting across a brilliant full moon", as viewed from Waterloo Bridge, while he was visiting London. In its use of quarter tones and dense textures this broke new ground, both for Panufnik and for Polish music. Panufnik also composed a "Sinfonia Rustica", deciding to give it a name rather than the designation "Symphony No. 1" out of feeling for his two lost works in the genre.