Mate error message under Debian 8.6.0

[Richard Owlett <rowlett@cloud85.net>]

When I right click on the top panel and then chose "Help" I 
receive "Could not display help document 'mate-user-guide'. The 
specified location is not supported."

As I do not have adequate bandwidth for install from internet I 
use purchased sets of DVDs. I assumed the document had not been 
on DVD1. I used Synaptic to add the other 12 DVDs. I searched for 
'mate-user-guide' without success.

Where would the required documentation be?

TIA