But this advantage involves a corresponding disadvantage, the danger of unduly severe mental application. Her mind is so constituted that she is in a state of feverish unrest while conscious that there is something that she does not comprehend. I have never known her to be willing to leave a lesson when she felt that there was anything in it which she did not understand. If I suggest her leaving a problem in arithmetic until the next day, she answers, "I think it will make my mind stronger to do it now." A few evenings ago we were discussing the tariff. Helen wanted me to tell her about it. I said: "No. You cannot understand it yet." She was quiet for a moment, and then asked, with spirit: "How do you know that I cannot understand? I have a good mind! You must remember, dear teacher, that Greek parents were very particular with their children, and they used to let them listen to wise words, and I think they understood some of them." I have found it best not to tell her that she cannot understand, because she is almost certain to become excited. Not long ago I tried to show her how to build a tower with her blocks. As the design was somewhat complicated, the slightest jar made the structure fall. After a time I became discouraged, and told her I was afraid she could not make it stand, but that I would build it for her; but she did not approve of this plan. She was determined to build the tower herself; and for nearly three hours she worked away, patiently gathering up the blocks whenever they fell, and beginning over again, until at last her perseverance was crowned with success. The tower stood complete in every part. Until October, 1889, I had not deemed it best to confine Helen to any regular and systematic course of study. For the first two years of her intellectual life she was like a child in a strange country, where everything was new and perplexing; and, until she gained a knowledge of language, it was not possible to give her a definite course of instruction. Moreover, Helen's inquisitiveness was so great during these years that it would have interfered with her progress in the acquisition of language, if a consideration of the questions which were constantly occurring to her had been deferred until the completion of a lesson. In all probability she would have forgotten the question, and a good opportunity to explain something of real interest to her would have been lost. Therefore it has always seemed best to me to teach anything whenever my pupil needed to know it, whether it had any bearing on the projected lesson or not, her inquiries have often led us far away from the subject under immediate consideration. Since October, 1889, her work has been more regular and has included arithmetic, geography, zoology, botany and reading.