diplomat Mansfeldt Findlay, in contrast, advised London that Christensen had "implied that their relations were of an unnatural nature and that consequently he had great power over this man". Findlay provided no evidence to support this insinuation. Findlay's handwritten letter of 1914 is kept in University College, Dublin, and is viewable online. This letter—written on official notepaper by Minister Findlay at the British Legation in Oslo—offers to Christensen the sum of £5,000 plus immunity from prosecution and free passage to the United States in return for information leading to the capture of Roger Casement. That amount would be approximately £2,616,000 in 2014. In November 1914, Casement negotiated a declaration by Germany which stated:The Imperial Government formally declares that under no circumstances would Germany invade Ireland with a view to its conquest or the overthrow of any native institutions in that country. Should the fortune of this Great War, that was not of Germany's seeking, ever bring in its course German troops to the shores of Ireland, they would land there not as an army of invaders to pillage and destroy but as the forces of a Government that is inspired by goodwill towards a country and people for whom Germany desires only national prosperity and national freedom. Casement spent most of his time in Germany seeking to recruit an Irish Brigade from among more than 2,000 Irish prisoners-of-war taken in the early months of the war and held in the prison camp of Limburg an der Lahn. His plan was that they would be trained to fight against Britain in the cause of Irish independence. American Ambassador to Germany James W. Gerard mentioned the effort in his memoir "Four Years in Germany": The Germans collected all the soldier prisoners of Irish nationality in one camp at Limburg not far from Frankfurt a. M. There efforts were made to induce them to join the German army. The men were well treated and were often visited by Sir Roger Casement who, working with the German authorities, tried to get these Irishmen to desert their flag and join the Germans. A few weaklings were persuaded by Sir Roger who finally discontinued his visits, after obtaining about thirty recruits, because the remaining Irishmen chased him out of the camp. On 27 December 1914 Casement signed an agreement in Berlin to this effect with Arthur Zimmermann in the German Foreign Office, renouncing all his titles