Diarist and memoirist, wrote a standard account of life as a civilian aristocrat in Germany during World War I. She kept a diary, describing life in Berlin and at the family estate of Krieblowitz (now Krobielowice) in Silesia (now Poland), from the point of view of an English exile among the deeply conservative Prussian nobility. This became the basis for her account of the war published as Princess Blucher, English Wife in Berlin:
1876 Sep 10. Born Brighton, Sussex, 10 Sep 1876. Princess Blücher was an Englishwoman, the daughter of Frederick Stapleton-Bretherton of a Catholic landed gentry family settled at Rainhill, Lancashire, by Isabella, daughter of William Bernard Petre, 12th Baron Petre.
1907 Aug 19. she married Gebhard Blücher von Wahlstatt, the fourth Fürst (Prince) Blücher (1865–1931), an Anglophile descended from the great Prussian General-Field-Marshal Gebhard Leberecht von Blücher (1742–1819), the first Prince, who had contributed to the allied victory at the Battle of Waterloo in 1815.
1914 After leaving the Channel Islands, where the family had taken the lease of Herm, the smallest of the islands, she spent the War years with the Prince in Germany, where he commanded a hospital train for the Silesian Order of Malta. .
Princess Blucher writes a few bits about Casement in : An English Wife in Berlin.
1914 Sir Roger, however, after a great deal of correspondence with some of his acquaintances in the Foreign Office in Berlin, was eventually allowed to enter Germany, and was then given free access to the prison camps where the Irish prisoners were. My husband went to him shortly after his arrival and tried to show him what a false position he had put himself in, and that he had better leave the country as quickly as possible, but it was no use. So after that we refused to see him or have anything more to do with him. When we first saw him, he was most enthusiastic and certain of success, his idea being to try and make the Irishmen promise that if they were free they would not fight for England, and would use their influence to prevent recruiting in Ireland. He was not really successful anywhere. In fact, he soon became offended, because he said the Berlin Foreign Office did not trust him enough. We hinted to him that no one ever really trusted a traitor, at which he was greatly incensed, protesting that he was not that ; and he was hardly less so when others, trying to soften down the name, called him an Irish rebel. He did not like that either. His measure of success with the Irish prisoners may be summed up in the answer he got from one very raw Irishman whom he asked whether he did not hate England. The Irishman's reply was: "Well, we may hate England, but that does not make us love Germany."
BERLIN, April 4, 1916. I was suddenly rung up on the telephone by Sir Roger Casement, saying he must see me at once. I was somewhat surprised, as I thought he was ill in bed at Munich. He was, a few days ago, when we heard of him last. However, although I was not keen on seeing him, I telephoned back to say that I would do so for a few minutes. Little did I think what a scene was before me. The poor man came into the room like one demented, talked in a husky whisper, rushed round examining all the doors, and then said: "I have something to say to you, are you sure no one is listening?" For one moment I was frightened. I felt I was in the presence of a madman, and worked my way round to sit near the telephone so as to be able to call for help. And then he began : "You were right a year ago when you told me that I had put my head into a noose in coming here. I have tried not to own you were right, and I did not like to tell you when you kept on urging me to get out of the country, that I realised from the moment I landed here what a terrific mistake I had made. And also I did not want to tell you that in reality I was a prisoner here. I could not get away. They will not let me out of the country. "The German Foreign Office have had me shadowed, believing I was a spy in the pay of England, and England has had men spying on me all the time as well. "Now the German Admiralty have asked me to go on an errand which all my being revolts against, and I am going mad at the thought of it, for it will make me appear a traitor to the Irish cause." And at these words he sat down and sobbed like a child. I saw the man was beside himself with terror and grief, and so I tried to get a few more definite facts out of him, and told him there is a way out of every difficulty if he would only tell me more. But he said, "If I told you more, it would endanger the lives of many, and as it is, it is only my life that has to be sacrificed." I made all sorts of suggestions, but all he would say was : "They are holding a pistol to my head here if I refuse, and they have a hangman's rope ready for me in England ; and so the only thing for me to do is to go out and kill myself." I argued him out of this, and at last he went away after giving me a bundle of farewell letters to be opened after his death. As he went out of the door, he said: "Tell them I was loyal to Ireland, although it will not appear so." He asked to see me again, but as I am watched like every one else here, and as there was evidently some political intrigue on, I had to refuse.
It is certain that the Germans in their own minds looked upon him as an English spy, and it was only when he happened to fall foul of a certain naval officer that they concocted their scheme of handing him back to England for England to do her dirty work herself. But between the time he was "handed back" and the time of his arrival in Germany, that is the time when I had the opportunity of seeing the man drink the cup of humiliation to the dregs, penniless and starving, friendless and hunted, should I have been a woman if I had not given him a meal at times, or on the last day, when he was going to a certain death, and came to me abject with terror and evidently out of his mind, could I have done less than promise to use what influence I had to ask for mercy for him? With this object I have written to a friend in England, but have little real expectation that it will save him from his fate.
1919 Feb 4. On the evening before our departure, General Sir Richard Ewart and his A.D.C. Lieut. Breen came to dine with us, and it was very interesting to hear the General's views and opinions of life in Berlin, and his experiences in East Africa, where, as he told us, he had been spending two years with my brother-in-law, Admiral Sir Edward Charlton, fighting against the German General, Lettow- Vorbeck, for whom he expressed much admiration, and who, he said, was down in the annals of the war as having"fought clean" and made a gallant defence against great odds. It was a strange coincidence that whilst waiting for our train one of the first people we saw at the station should have been Lettow-Vorbeck on his way back to Germany from Africa. Sir Richard, who was busy repatriating prisoners of war, said that the men who had given him most trouble were those of the Casement Brigade, who were very unwilling to return to England, not knowing what fate might be awaiting them there, or whether they might not be tried for their part in the Casement episode. One of them, we heard to our great amusement, had been spending all his time last week shooting at the Bolshevists on the top of the Brandenburg Tor, which he seemed very much to prefer to returning home to the bosom of his family.
died Worthing 20 Jan 1960),