Mathematical Demonstrations, yet by expressing my Sense and Meaning more properly and clearly then I have done heretofore: But the chief reason of all was, the Authority of your Command, which did work so powerfully with me, that I could not resist, although it were to the disgrace of my own judgment and wit; and therefore I am fully resolved now to go on as far, and as well as the Natural strength of my Reason will reach: But since neither the strength of my Body, nor of my understanding, or wit, is able to mark every line, or every word of their works, and to argue upon them, I shall onely pick out the ground Opinions of the aforementioned Authors, and those which do directly dissent from mine, upon which I intend to make some few Reflections, according to the ability of my Reason; and I shall meerly go upon the bare Ground of _Natural Philosophy_, and not mix Divinity with it, as many Philosophers use to do, except it be in those places, where I am forced by the Authors Arguments to reflect upon it, which yet shall be rather with an expression of my ignorance, then a positive declaration of my opinion or judgment thereof; for I think it not onely an absurdity, but an injury to the holy Profession of Divinity to draw her to the Proofs in _Natural Philosophy_; wherefore I shall strictly follow the Guidance of _Natural Reason_, and keep to my own ground and Principles as much as I can; which that I may perform the better, I humbly desire the help and assistance of your Favour, that according to that real and intire Affection you bear to me, you would be pleased to tell me unfeignedly, if I should chance to err or contradict but the least probability of truth in any thing; for I honor Truth so much, as I bow down to its shadow with the greatest respect and reverence; and I esteem those persons most, that love and honor Truth with the same zeal and fervor, whether they be Ancient or Modern Writers. Thus, _Madam_, although I am destitute of the help of Arts, yet being supported by your Favour and wise Directions, I shall not fear any smiles of scorn, or words of reproach; for I am confident you will defend me against all the mischievous and poisonous Teeth of malicious detractors. I shall besides, implore the assistance of the Sacred Church, and the Learned Schools, to take me into their Protection, and shelter my weak endeavours: For though I am but an ignorant and simple Woman, yet I am their devoted and honest Servant, who shall never quit the respect and honor due to them, but live and die theirs, as also, MADAM, _Your Ladiships_ _humble and faithful Servant._ M. N. II. _MADAM,_