What is "williswinde"

Williswinde is a collection of verses written by Louis Couperus. The first edition (1.250 books were printed for this edition) was published by L.J. Veen in 1895. In 1904 Veen acquired full righs of Williswinde and 16 other works that were written by Couperus. For the first edition in 1894 Couperus received 200 guilders and the poems by that time had already been published in a number of Dutch newspapers and magazines. However Couperus had some difficulty to get the poem Williswinde published, as he wrote in a letter to a colleague, Smit Kleine. The book cover was designed by painter Ludwig Willem Reymert Wenckebach.