In agriculture, gardening, and public improvements of all kinds, he has taken a lively interest. The rural ornaments of the town in which he lives owe much to him. He may be said to have introduced the fruit and horticulture which are now becoming so abundant as luxuries, and so remarkable as ornaments of the village. In 1843 he received the degree of D.D. from Bowdoin College. Of Dartmouth College nearly half the graduates are his pupils. While commissioner of common schools, he published a series of letters to teachers and students which were more generally republished in the various papers of the country than anything else of the kind ever before written. Perhaps no one in this country has discussed so great a variety of subjects. His essays upon the proper standard of education for the pulpit, addresses on the utility of certain proposed lines of railway, orations on the duties of the citizen to the state, lectures before various medical societies, speeches in the New Hampshire House of Representatives, letters written while commissioner of common schools, contributions to periodicals, addresses before a great variety of literary associations, writings on agriculture and gardening, yearly reports on education, lectures on classical learning, rhetoric and belles-lettres, and sermons, delivered weekly for more than twenty years, illustrate a life of remarkable activity, and dedicated to the best interests of mankind. Unmoved by the calls of ambition, which might have tempted him to some one great and engrossing effort, his aim has been the general good of the people. The following extract from the dedication, to his pupils, of his _Addresses and Miscellaneous Writings_, evinces something of his purpose: "It is now five-and-twenty years since I adopted the resolution never to refuse to attempt anything consistent with my professional duties, in the cause of learning, or religion, which I might be invited to do. This resolution I have not at any time regretted, and perhaps I may say, I have not essentially violated it. However this may be, I have never suffered from want of something to do." Professor Haddock's style is remarkable for purity and correctness. His sentences are all finished sentences, never subject to an injurious verbal criticism, without a mistake of any kind, or a grammatical error.