What Was That Seen In the Cave of Hira?

According to the well-known story, Allah's boss was told to read something. But what was that something? In the Sirah by Ibn Ishaq and edited by Ibn Hisham we are told of a piece of cloth upon which something was written.

When it was the night on which God honoured him with his mission and showed mercy on His servants thereby, Gabriel brought him the command of God. ‘He came to me,’ said the apostle of God, ‘while I was asleep, with a coverlet of brocade whereon was some writing, and said, “Read!” I said, “What shall I read ?” He pressed me with it so tightly that I thought it was death; then he let me go and said, “Read!” I said, “What shall I read?” He pressed me with it again so that I thought it was death; then he let me go and said “Read!” I said, “What shall I read?” He pressed me with it the third time so that I thought it was death and said “Read!” I 153 said, “What then shall I read?”—and this I said only to deliver myself from him, lest he should do the same to me again. He said:

“Read in the name of thy Lord who created,

Who created man of blood coagulated.

Read! Thy Lord is the most beneficent,

Who taught by the pen,

Taught that which they knew not unto men.” 1

T. 1150 So I read it, and he departed from me. And I awoke from my sleep, and it was as though these words were written on my heart. The Life Of Muhammad, by Ibn Ishaq : Alfred Guillaume : Free Download, Borrow, and Streaming : Internet Archive Page 106

In his dream he sees a brocade. Did this brocade contain the words above? Did the word 'read' appear on it?

Some Thoughts on S 96:1-5

Now, if this is the quran, and if 'the' quran is supposed to be in or on the Guarded Tablet, where is this brocade? Is the brocade on the Guarded Tablet? If not, if the brocade is extant, and if it ever existed, is it not guarded? And if not extant and something that actually existed, why isn't it?

The Guarded Tablet