Two Essays Posted on The Zen Site:

On the history of Zen in China:
: http://www.thezensite.com/ZenEssays/HistoricalZen/Keeping_It_Real.html
and the life of Hongzhi Zhengjue (including his "conflict" with Dahui):
http://www.thezensite.com/ZenEssays/HistoricalZen/Bright_Field_of_Spirit_Hongzhi.html