[4] As he now had diplomatic residence rights he no longer needed a licence to trade in Canton from the East India Company.
[4] Becoming Magniac & Co. after the retirement of Thomas Beale in 1814,[5]: 17 the firm under Charles grew into one of the largest and most prominent of all the China trading houses.
After Charles' death in 1824, the firm was taken over by his brother Daniel who was subsequently forced to resign after he married his Chinese mistress and brought the family into disrepute.
After an extensive search for a senior partner, Hollingworth settled on Jardine,[7][8] whose business reputation was already well known throughout Asia.
[14] Magniac's collection of medieval art included Christ Crowned with Thorns by Hieronymus Bosch, now in the National Gallery in London.
He also owned a fake "15th-century" Swiss or German coffer now in the Victoria and Albert Museum[15] as well as the Reliquary from the Shrine of St. Oda which later passed to his son Charles.