"Yankee" remained off Cienfuegos for two days. On 14 June, there was a brief moment of anxiety when a large man-of-war started out of the harbor. "Yankee" cleared for action and stood in toward the warship, but all hands breathed a sigh of relief when the newcomer was identified as the neutral German SMS "Geier". The following afternoon, the auxiliary cruiser gave up her vigil for "Purissima Concepcion" off Cienfuegos and set a course back to the eastern end of Cuba. She rejoined the Santiago blockade on 16 June but put into the anchorage at Guantanamo Bay the following day to take on coal. Late on the 18 June, the ship returned to sea bound once more for blockade duty off Cienfuegos. On the 19 June, during the passage from Guantanamo Bay to Cienfuegos, "Yankee" stopped and inspected two sailing vessels—a British schooner and a Norwegian bark—and a steamer, the British SS "Adula". All three had their papers in order, and the auxiliary cruiser allowed them to proceed unmolested. That evening, she arrived off Cienfuegos and began cruising on blockade station between that port and Casilda.