In two films about the Titanic, Murdoch was portrayed shooting passengers and himself during the sinking; this was based on a number of eyewitness testimonies of a shooting/suicide by an officer during the launching of the last lifeboat. It is possible that Murdoch was the officer.
In general, to append is to join or add on to the end of something. For example, an appendix is a section appended (added to the end) of a document. In computer programming, append is the name of a procedure for concatenating (linked) lists or arrays in some high-level programming languages.
appendage - a natural prolongation or projection from a part of an organism either animal or plant; a bony process. outgrowth, process. horn - one of the bony outgrowths on the heads of certain ungulates. horn - any hard protuberance from the head of an organism that is similar to or suggestive of a horn.