Item 100 - Letter from Augustus De Morgan

2 pp

7 Camden St. and Town - Thanks him for his paper on mental philosophy. 'At first glance, I see an approximation between my ideas & yours in finding that you can admit the phrase "laws of mental activity" in place of "fundamental ideas". If your meaning of the latter phrase is interchangeable with any sense in which I can use the former, I have read much of your writing at cross-purpose'. He has no doubt on the 'absolute substantive reality of all the primary truths of maths. I have never had any doubt: but I have an idea that different people hold them by different hooks'.