[Footnote 9: _Recent British Philosophy_, pp. 265-66.] That this is no mere isolated estimate of a partial friend it would not be difficult to prove. This was what his friends thought of him, and what they had taught others outside to think of him too. The time, however, had now come when it had to be put to the proof. During the first five years of his ministry at Berwick, as we have seen, Cairns devoted himself entirely to his work in Golden Square. He must learn to know accurately how much of his time that work would take up, before he could venture to spend any of it in other fields. But in 1850 he felt that he had mastered the situation, and accordingly he began to write for the Press. The ten years between 1850 and 1860 were years of considerable literary activity with him, and it may be said at once that their output sustained his reputation, and even added to it. There falls to be mentioned first a Memoir of his friend John Clark, who, after a brief and troubled ministerial career, had died of cholera in 1849. Cairns's Life of him, prefixed to a selection from his Essays and Sermons, fills only seventy-seven small pages, and it is in form to a large extent a defence of metaphysical studies against those who regard them as dangerous to the Christian student. But it contains many passages of great beauty and tenderness, and delineates in exquisite colours the poetry and romance of College friendships. "I am greatly charmed," wrote the author of _Rab and his Friends_ to Cairns, "with your pages on the romance of your youthful fellowship--that sweet hour of prime. I can remember it, can feel it, can scent the morn."[10] [Footnote 10: See above, pp. 44-45.]