Dear Marek,

    Thanks for your invitation to give a seminar at R.O.E.. I'd
certainly like to do that, but don't think I can get up and
back to talk in Edinburgh and fit around my lecturing schedule
- either this term or next. However, by the following term
(i.e. April onwards) I will have finished lecturing and so 
would be very happy to come up. Could I be scheduled for then?

                          Cheers,  Cathie