HMS Seraph was the submarine which was used to deliver the body .. If your ever in Charleston SC have a look on the Citadel campus. The have the Periscope and torpedo loading hatch from the HMS Seraph. The loading hatch was actually used instead of the torpedo tubes because it was determined that the compressed air would impregnate his clothing, so they used the Loading hatch which was where the body was stored on the way to Spain.
http://www.citadel.edu/main/about/campusguide/virtualtour/monuments.html#seraph
Only in England would a name like Cholmondeley be pronounced “Chumly.”