He seems to have been preoccupied with the issue of transmission even during the early days of studying under Huai-hai. His very first question to the older master reportedly was "How did the early Ch'an masters guide their followers?" Huai-hai answered this very un-Ch'an question with silence, an implied rebuke. When Huang-po pressed the point, Huai-hai called him a disappointing disciple and said he had best beware or he (Huang-po) would be the man who lost Ch'an.6 In a later episode, however, Huai-hai designates Huang-po as a successor in Dharma, via a famous transmission exchange in which Huang- po finally demonstrates wordless communication. _One day Huai-hai asked Huang-po, "Where have you been?" The answer was that he had been at the foot of the Ta-hsiung Mountain picking mushrooms. Huai-hai continued, "Have you seen any tigers?" Huang-po immediately roared like a tiger. Huai-hai picked up an ax as if to chop the tiger. Huang-po suddenly slapped Huai-hai's face. Huai-hai laughed heartily, and then returned to his temple and said to the assembly, "At the foot of the Ta-hsiung Mountain there is a tiger. You people should watch out. I have already been bitten today_."7 _ _This enigmatic utterance by Huai-hai has been taken by many to signify that Huang-po was being acknowledged as a worthy being, perhaps even a successor. The scholar Chang Chung-yuan has observed that the genius of this response was its freedom from the trap of logical assertion or negation.8 The act signified freedom from the alternatives of words or silence. Could it be that with this incident we have finally captured a wordless transmission? Huang-po also had a number of exchanges in later years with Nan-ch'uan (738-824), another of his seniors who had studied at the feet of old Ma-tsu. As the story is reported in _The Transmission of the Lamp_: _Some time later Huang-po was with Nan-ch'uan. All the monks in Nan- ch'uan's monastery were going out to harvest cabbage. Nan-ch'uan asked Huang-po, "Where are you going?" Huang-po answered, "I am going to pick cabbage." Nan-ch'uan went on, "What do you use to pick cabbage?" Huang- po lifted his sickle. Nan-ch'uan remarked, "You take the objective position as a guest, but you do not know how to preside as a host in the subjective position." Huang-po thereupon knocked on the ground three times with his sickle.9 _ When Blofeld translates this puzzling episode from _On the Transmission of Mind_, he comments that he has been unable to find a modern Zen master who could explain its meaning.10 However, Nan-ch'uan's final remark questions the degree of Huang-po's enlightenment, and some assume the latter knocked on the ground to signify defeat.11