Complex sentence: Anthony was a close friend of Ford Madox Brown, mentioned frequently in Brown's diaries; and D. G. Rossetti secured him the patronage of the important Newcastle collector James Leathart in the 1860s.
Split into simpler sentences: Anthony was a close friend of Ford Madox Brown, mentioned frequently in Brown's diaries. Dante Gabriel Rossetti secured him the patronage of the important Newcastle collector James Leathart in the 1860s.