Explanation #1: Rashi explains that this is when they started to ask for meat.

Explanation #2: The Ri says that he does not think this is correct. Rather, the first punishment refers to what is said in the Medrash, "And they traveled - they traveled away from Har Sinai for three days like a child who leaves school, he runs away and then he goes away. Similarly, they ran away from Har Sinai for three days because they learned a lot of Torah at Har Sinai. Hash-m remarked, "Should I put punishment next to punishment?! No. Rather, I will interrupt between these two incidents with the Parshah, "va'Yehi b'Nesoa ha'Aron."

Explanation: The Ri says that the case is when they were found in the hands of heretics. If a heretic actually wrote it, the Gemara in Gitin (45b) explicitly states, "If it is found in the hand of a heretic it should be hidden away, but if it is written by him it should be burned."

Explanation (cont.): It is difficult to say that this is according to Rebbi Tarfon and not like the Rabbanan and Rebbi Yosi.

Explanation: You should not say that one only cannot save from a fire, because if you allow him to do so he will put out the fire. Rather, even when there is no reason to make a decree it is forbidden to carry them and take them out.

Explanation (cont.): This second part of the Beraisa is according to the Rabbanan, as it is not needed according to Rebbi Tarfon.

Explanation #1: This refers to a heretic, as explained by Rashi.

Explanation #2: Our teacher heard [from a Jew who came from Greece who said] that in Greek the word "Flusfus" means the way of knowledge.

Explanation #3: Some have the text "Fila Saba," which is a term that refers to scoffing and making fun, as stated in Medrash Aichah Rabah "d'Fali b'Yehudai" meaning that he scoffed and made fun of Jews.

Explanation: He does not argue on Rav, as he understandable admits that according to our Mishnah that explains that the reason is because it will cause people not to hear the sermon in the Beis Medrash that one can read when there is no sermon. Rather, he is coming to say that Rebbi Nechemyah argues on the Mishnah.

Explanation #1: Rashi explains that this is referring to letters.

Question: This is difficult, as the custom is to read documents and letters sent from place to place. It is certainly permitted to carry them, as they are fit to stop up a bottle.

Explanation #2: The Ri understands that Shtarei Hedyotos only refers to credit documents and the like. However, letters are permitted, as sometimes they contain information pertaining to matters of life and death.

Explanation #2 (cont.): Even if one knows that this letter does not contain matters pertaining to life and death, Rabeinu Tam permits it. He says that they are not considered Shtarei Hedyotos since he does not need what is written in it. If he does not know, perhaps he does have a great need to know or it in fact does contain matters of life and death. It is therefore permitted.

Proof #1: This is implied by the Yerushalmi that says, "Why don't we read holy writings? This is due to Shtarei Hedyotos. If you say it is permitted, he will say why shouldn't I deal with my documents?" This implies that it is referring to documents pertaining to credit and the like.

Proof #2: Similarly, Rashi explains later regarding the decree not to read Shtarei Hedyotos that it is referring to purchase and sale documents. He made this correction in his own handwriting.

Observation: However, the books about wars written in foreign languages appear to Rabeinu Yehudah to be forbidden to read, as they are not worse (in their stringency) from the Beraisa later (149a) that states that it is forbidden on Shabbos to read the writing that is under a figure or bust. The Ri does not even know who permitted reading such books during the week, as it is like sitting amongst scoffers (see Avodah Zarah 18b).

Explanation: They argue after it was fully skinned. The Rabbanan permit carrying it, as it is still needed to protect the meat so that the meat should not become dirty. Rebbi Yishmael forbids carrying it. However, when it is only skinned until the chest everyone permits carrying it, as is apparent later.

Implied Question: Even though Rebbi Yishmael only permitted skinning it until the chest, they argue regarding a case where it was fully skinned. (How can there be a case according to Rebbi Yishmael where it was fully skinned?)

Answer #1: The case is where he transgressed and skinned it.

Answer #2: Alternatively, the case is regarding the Korbanos Tamid and Musaf that are permitted to be skinned.