Package listed in MELPA, but not found in package install

Question

I am currently trying to install ENSIME for emacs 24.3.1 following the instructions at https://github.com/ensime/ensime-emacs under the quick start; I\'ve added

Answer 1

After doing the usual editing of .emacs to make melpa avalaible and restarting Emacs, I searched the list of packages for the one I wanted.

M-x package-list-packages
C-s 

Then I clicked on the name of the package and pressed the install button. I am unsure as to why M-x package-install RET failed, but clicking the install button worked for me.