"In 1834 he married Miss Abigail Grant Jones Cutler, only child of Joseph and Abigail Cheesboro Grant (Jones) Cutler, of Newburyport, Mass. Mrs. Crosby becoming an invalid, Professor Crosby took her to Europe and traveled with her through England, Germany, and France, until they reached Paris, where Mrs. Crosby died. On his return he resumed the duties of his professorship. After the death of his father-in-law, Mr. Cutler, he resigned his professorship, and removed to Newburyport to care for Mrs. Cutler, who was an invalid. His Greek Grammar, theological disquisitions, and the superintendency of schools in Newburyport occupied his attention until Mrs. Cutler's death in 1854, when he entered into the employment of the Board of Education in Massachusetts as its agent. In this capacity he rendered the State most valuable services by visiting the public schools in various parts of the State, and by his instructive and practical lectures on educational subjects. So efficient were his labors, that in 1857 he was appointed by the Board of Education to the principalship of the State Normal School in Salem; this important post he occupied eight years. To the interests of this school he zealously devoted his great knowledge and ability, raising it to a high standard of excellence and giving to it a most honorable reputation. He gave the school the largest part of its valuable library, and obtained for its use the most of its considerable cabinet. By his heartfelt kindness and his faithful instructions he secured the love and profound esteem of his pupils, who will ever hold him in affectionate remembrance. In the Normal School and elsewhere, as he had opportunity, Professor Crosby earnestly advocated the liberal education of women, believing that their educational advantages ought to equal those enjoyed by men. "While principal of the school at Salem he, for several years, was the editor-in-chief of the 'Massachusetts Teacher,' performing gratuitous labors which were highly appreciated by the teachers of Massachusetts and of other States. "Having traveled through the Southern States, that he might gain a better knowledge of his own country before he went abroad, he became deeply impressed with the iniquities of slavery, and dropped readily into the ranks of the abolitionists. He was intensely interested in all the discussions and phases of freedom, from Adams's 'Right of Petition' crusade down to the day of his death. His patriotism during the war was full and glowing. The political disquisitions in his 'Right Way,' which he edited for a year, upon the question of reconstruction, were keen and convincing. He also published a series of elementary lessons for teaching the freed-men of the South to read.