Once a feared invasion of Éire by US Troops stationed in Northern Ireland in 1942 failed to materialise, Ryan was dropped as a possible mission specialist in further covert Abwehr and Foreign Ministry plans and operations. He was approached late 1943 for his opinion on the feasibility of a ""Geheimsender"" (secret transmitter) propaganda operation in Ireland for broadcast to the United States, but the plan never reached fruition. It is also known that he discussed Francis Stuart's radio broadcasts with him prior to their commencement.