Thanks to Jeffrey Murray, Head of Classics at the University of Cape Town, a hitherto unkown South-African paper on Latin letter-writing and Sidonius from c. 1930 by the then President of the Classical Association of South Africa, William Ritchie, has come to our notice.
Download it from this website, page Bibliography 1900-1999, year 1931.
A brand-new historical novel on Sidonius is forthcoming. Annabelle Grierson (in arte J A Grierson) has recently got her Creative Writing Master degree at Auckland University of Technology with a two-part novel breathing life into fifth-century history, with Sidonius among its protagonists. She was inspired by his letters, and the novels actually quote them, including the famous letter to Bishop Graecus (Ep. 7.7), which is cited almost in full. The first volume, entitled The Wars with Attila, centred around a fictionalised Avitus, is expected to be published next Spring. The second volume, centred around Sidonius, will be called The Last Roman.
For information, go here.