 William Bullock, an English traveler and collector, took the codex under dubious conditions to London and there included it in an exhibition on Mexico on 8 April 1824.Once the exhibition was closed, Bullock returned the codex to Mexico, though the circumstances of that return are unknown.The codex was much changed at this time; Bullock printed and attached a label to present final folio, and it seems that the final folios were lost between the years 1804 and 1824.