List of best mirrors for IP address 3.15.214.244, located in an unknown country.
I am very sorry, but no mirror was found. Feel free to download directly:
http://mirrordirector-mb.raspbian.org/raspbian/pool/main/g/glibmm2.68/libglibmm-2.68-1t64_2.82.0-1_armhf.deb