It has been truly said that among the subjects which never fail to excite Englishmen is Slavery. "No public man," said Matthew Arnold, "in this country will be damaged by having even 'fanaticism' in his hatred of slavery imputed to him." In July, 1875, the Admiralty issued to Captains of Her Majesty's ships a Circular of Instructions which roused feelings of anger and of shame. This circular ran counter alike to the jealousy of patriots and to the sentiment of humanitarians. It directed that a fugitive slave should not be received on board a British vessel unless his life was in danger, and that, if she were in territorial waters, he should be surrendered on legal proof of his condition. If the ship were at sea, he should only be received and protected until she reached the country to which he belonged. These strange and startling orders were not in harmony either with the Law of Nations or with the law of England. They infringed the invaluable rule which prescribes that a man-of-war is British territory, wherever she may be; and they seemed to challenge the famous decision of Lord Mansfield, that a slave who enters British jurisdiction becomes free for ever. Parliament had risen for the recess just before the circular appeared, so it could not be challenged in the House of Commons; but it raised a storm of indignation out of doors which astonished its authors. Disraeli wrote "The incident is grave;" and, though in the subsequent session the Government tried to whittle down the enormity, the "incident" proved to be graver than even the Premier had imagined; for it showed the Liberals once again that Toryism is by instinct hostile to freedom. But events were now at hand before which the Public Worship Regulation Act and the Slave Circular paled into insignificance.