Socrates and Protagoras discuss

It has been a long time and still I remembed reading this part of the dialogue (or what Plato made of it)
(Source: http://www.gutenberg.org/files/1591/1591-h/1591-h.htm)

" And I said: Protagoras, I have a wretched memory, and when any one makes a long speech to me I never remember what he is talking about. As then, if I had been deaf, and you were going to converse with me, you would have had to raise your voice; so now, having such a bad memory, I will ask you to cut your answers shorter, if you would take me with you.

What do you mean? he said: how am I to shorten my answers? shall I make them too short?

Certainly not, I said.

But short enough?

Yes, I said.

Shall I answer what appears to me to be short enough, or what appears to you to be short enough?

I have heard, I said, that you can speak and teach others to speak about the same things at such length that words never seemed to fail, or with such brevity that no one could use fewer of them. Please therefore, if you talk with me, to adopt the latter or more compendious method.

Socrates, he replied, many a battle of words have I fought, and if I had followed the method of disputation which my adversaries desired, as you want me to do, I should have been no better than another, and the name of Protagoras would have been nowhere.

I saw that he was not satisfied with his previous answers, and that he would not play the part of answerer any more if he could help; and I considered that there was no call upon me to continue the conversation; so I said: Protagoras, I do not wish to force the conversation upon you if you had rather not, but when you are willing to argue with me in such a way that I can follow you, then I will argue with you. Now you, as is said of you by others and as you say of yourself, are able to have discussions in shorter forms of speech as well as in longer, for you are a master of wisdom; but I cannot manage these long speeches: I only wish that I could. You, on the other hand, who are capable of either, ought to speak shorter as I beg you, and then we might converse. But I see that you are disinclined, and as I have an engagement which will prevent my staying to hear you at greater length (for I have to be in another place), I will depart; although I should have liked to have heard you.

Thus I spoke, and was rising from my seat, when Callias seized me by the right hand, and in his left hand caught hold of this old cloak of mine. He said: We cannot let you go, Socrates, for if you leave us there will be an end of our discussions: I must therefore beg you to remain, as there is nothing in the world that I should like better than to hear you and Protagoras discourse. Do not deny the company this pleasure.

Now I had got up, and was in the act of departure. Son of Hipponicus, I replied, I have always admired, and do now heartily applaud and love your philosophical spirit, and I would gladly comply with your request, if I could. But the truth is that I cannot. And what you ask is as great an impossibility to me, as if you bade me run a race with Crison of Himera, when in his prime, or with some one of the long or day course runners. To such a request I should reply that I would fain ask the same of my own legs; but they refuse to comply. And therefore if you want to see Crison and me in the same stadium, you must bid him slacken his speed to mine, for I cannot run quickly, and he can run slowly. And in like manner if you want to hear me and Protagoras discoursing, you must ask him to shorten his answers, and keep to the point, as he did at first; if not, how can there be any discussion? For discussion is one thing, and making an oration is quite another, in my humble opinion."