Console help - drive details

Bit of an emergency so any help really appreciated.

I am trying to work out whether or not the there is a way for me to see the details (specifically names) of external drives that have been connected to my machine in the last 6 weeks. Basically a hard drive with confidential information has gone missing and I would like to see if it was ever connected to my machine, does anyone know how or where I can find this information?

Thanks

iMac, OS X Mavericks (10.9.5)