 In 1941 Amir published another collection of poems , entitled Buah Rindu ( " Fruits of Longing " ) , which consisted mostly of his earlier works . Jassin notes that the works in Nyanyi Sunyi appear more developed and mature than those in the later collection . Teeuw notes that the later collection was more explicitly about romantic love , rather than the religious love of Nyanyi Sunyi . 
