Complex sentence: Although Dickens continued to place pieces in the magazine, none of them bore a signature until August 1834, when "The Boarding House" appeared in "The Monthly Magazine" using the strange pen-name "Boz".
Split into simpler sentences: Although Dickens continued to place pieces in the magazine, none of them bore a signature. That is until August 1834, when "The Boarding House" appeared in "The Monthly Magazine" using the strange pen-name "Boz".