_A._ I am satisfied that the magnetical poles and the poles of the earth are the same. But thus much I confess, if they were not the same, the longitude were found. For the difference of the latitudes of the earth’s equator and of the magnetical equator, is the difference of the longitude. But proceed. _B._ “The earth being a solid body, and the magnetic sphere that encompasseth the earth being a substance that hath not solidity to keep pace with the earth, loseth in its motion: and that may be the cause of the motion of the magnetic poles from east to west.” _A._ This is very fine and unexpected. The magnetic sphere, which I took for a globe made of a magnet, has not solidity to keep pace with the earth, though it be one of the hardest stones that are. It encompasseth the earth; yet I thought nothing had encompassed the earth but air in which I breath and move. By this also the whole earth must be a loadstone. For two bodies cannot be in one place. So that he is yet no farther than Dr. Gilbert whom he slights. And if the sphere be a magnet, then the earth and loadstone have the same poles. See the force of truth! which though it could not draw to it his reason, hath drawn his words to it. _B._ But perhaps he meant that the magnetic virtue encompasseth the earth, and not the magnetic body. _A._ But that helpeth him not. For if the body of the magnet be not there, the virtue then is the virtue of the earth; and so again the poles of the earth are magnetic poles. _B._ You see how unsafe it is to boast of doctrines as of God’s gifts, till we are sure that they are true. For God giveth and denieth as he pleaseth, not as ourselves wish; as now to him he hath given confidence enough, but hath denied him, at least hitherto, the finding of the longitudes. In the next place (p. 8) he seems much pleased that his doctrine agrees with an opinion of Keplerus, that from the creation to the year of our Lord, it is to the year 1657 now 5650 years; and with that which he saith some divines have held in times past, that as this world was created in six days, so it should continue six thousand years. By which account the world will be at an end three hundred and fifty years hence; though the Scripture tells us it shall come as a thief in the night. O what advantage three hundred and forty years hence will they have that know this, over them that know it not, by taking up money at interest, or selling lands at twenty years’ purchase! _A._ But he says he will not meddle with that. _B._ Yes, when he had meddled with it too much already. _A._ But you have not told me wherein consisteth this agreement between him and Keplerus.