How to recover the chat log of a deleted Skype contact?
Solution 1:
StudioHack covered the location.
I recently moved my chat history and from what I saw in the file, it was plain-text, but very much a mess of mostly random text. You might need to re-add the contacts and import the chat history to make it easily readable.
I'm sure you could pick out the parts you want if you're looking for something specific, but the chat history file contains the chat history/dates/times for every contact in your Skype. It's not seperated per contact, like in, say, Windows Live Messenger.