Christina Rossetti's page on the Victorian Web
http://www.victorianweb.org/authors/crossetti/index.html
This website provides information about Christina Rossetti's life and works as well as helpful supplementary essays.
Performance of "In the Bleak Midwinter"
http://www.youtube.com/watch?v=K-9yB6t8Vl4
The King's College Choir of Cambridge performs Rossetti's "In the Bleak Midwinter," using Harold Darke's musical setting.
Poems of Christina Rossetti
http://www.poetryfoundation.org/bio/christina-rossetti
Poetry Foundation provides several online versions of Christina Rossetti's poetry.