Remark: It is not proper to elaborate here. (In Yevamos (42b DH R. Yosi), Tosfos proved that R. Yosi does not decree an Arusah due to a Nesu'ah.)

Explanation #1 (Rashi): This is even if they are Hefker.

Inference: There is no question [that they have 2000 Amos in every direction] if they have owners.

Question: If they have an owner, they are like the feet of their owner!

Suggestion: Perhaps we can establish it when the owner is in another city. Now, they are not like the feet of their owner, but still Shevisah applies to them more than to Hefker, and they have 2000 Amos in every direction!

Rejection: It is totally unreasonable to establish it when they have an owner, for when they have an owner, what is the difference between inside the Techum and outside the Techum?! (Maharam - if they are Hefker, one might have thought that inside the Techum, the people of the city intend for them. If they have an owner, in any case it depends on his intent!)

Answer: We discuss of Hefker. It mentions inside the Techum to teach that even so, they do not acquire the Shevisah of the city.

Question: Why is here different [than rain]? "They have 2000 Amos in every direction" implies from their place, since it did not teach "like the feet of the people of the city";

Regarding rain close to a city, it is like the feet of the people of the city, like we said above (45b)!

Answer #1: There, the people of the city intend for it. Rain is known to all people of the city. However, Hefker storehouses, if they were known, people would have acquired them!

Answer #2: Perhaps we can distinguish, for there they are near and close. The people of the city intend for them. Here, they are far, but they are inside the Techum.

Answer #3: It seems that 2000 Amos is not from their place, rather, from the city, just like rain above.

Source: It is proven regarding a fishing trap between the Techum of two cities, that according to R. Yochanan ben Nuri, Hefker items within the Techum acquire Shevisah of the city, even if the people of the city did not intend for them, like I will explain below. The Beraisa here is like R. Yochanan ben Nuri.

Implied question: We should ask that it should teach 'like the feet of the people of the city", like we asked above!

Answer: Since it mentioned here inside the Techum, "2000 Amos in every direction" properly connotes from the city.

Implied question: They were taught with one who borrows a Kli from a Nochri, and if a Nochri stands outside the city, we count for him 2000 Amos from his place!

Answer: The Stam case is, the Nochri stands in the city.

Explanation (Rashi, on the Mishnah 41b): "They took him to another city", and it is surrounded by Mechitzos.

Inference: It is considered like four Amos to permit traversing the entire [city] only if it is surrounded by Mechitzos, similar to a Dir or Sahar.

Consequence: We must say that Mevarkesa was surrounded by Mechitzos.

Implied question: Regarding one who put his Eruv in a tree, we asked (32b) "also outside the Ibur of the city [within four Amos it should be valid], for Rava taught that one who places an Eruv has four Amos" (we consider that Mechitzos surround it);

Inference: Also inside the Ibur of the city, the reason [it is valid] is because the entire city and its Ibur are like four Amos, even though there is no Mechitzah!

Answer: That is only regarding one who is Shoves or puts his Eruv there. He has 2000 Amos in every direction, even outside the Mechitzos, since he [or it] is in the Ibur of the city;

However, if one comes from outside the Techum, it is not considered like four Amos unless it is surrounded by Mechitzos.

Explanation (Ri): We require also that it is Mukaf l'Dirah. He is no better than one who was Shoves within Mechitzos, who has 2000 Amos in every direction;

Even so, [within the Mechitzos] is not considered for him like four Amos if the surrounded area is more than Beis Sa'atayim that was not Hukaf l'Dirah, like it says about one who was Shoves on a mound or a crevice in a rock (15a).

Pesak: One must be careful about something brought from outside the Techum for this Yisrael, that it is permitted for another Yisrael, or it was brought for a Nochri. One may not move it outside of four Amos in a city without Mechitzos that surrounded it for the sake of residence.

Explanation #1: This is an expression of traps and fishing nets between two Techumim of Shabbos. An iron wall is needed lest the water go between one Techum and the other;

Whatever is within the Techum of the city does not have Shevisah in its place to have 2000 in every direction from its place. Rather, it gets the law of the city. Rashi explained so.

Explanation #2: Also R. Tam explained like this, but he explained that Cherem is an expression [of drying] like "v'Hecherim Hash-m [Es] Leshon Yam" (he dried the Yam Suf). When the sea deposits debris and it dries, there remain crevices full of water. Cherem is a crevice full of water. Also R. Chananel explained that "Cherem" is an expression of a furrow.

Question: Why do we establish it like R. Yochanan ben Nuri? Also according to Rabanan, it says above (45b) that rain close to a city, it is like the feet of the people of the city!

Answer: Here, [the water] is drawn from one Techum to the other, so Batlah Daitam (their intent does not help), and it is like Hefker items, which do not acquire Shevisah according to Rabanan. They are like the feet of the one who acquires them;

However, according to R. Yochanan ben Nuri, that it acquires Shevisah when it is in the Techum of the city, it acquires the Shevisah of the city even though [the people of the city] do not intend for it.

Implied suggestion: According to R. Yochanan [ben Nuri], it acquires Shevisah in its place. An iron wall is needed to enter it into the city, because some of the water is more than 2000 Amos from the city.

Rejection #1: If so, why did it mention between two Techumim? Even if there is not another city, they cannot enter water into the city that was outside its Techum!

Rejection #2: Even an iron wall would not help to [permit] entering it into the [entire] city from the end of 2000 Amos, since at the beginning of the city finish the 2000 [Amos] of the water.