We are staying in Porto and can visit Coimbra on a Saturday or Sunday as we understand that the ruins are shut on a Monday. Although I have gone on the rodonotrte bus link can not find a bus which will link with our train time. We woud arrive at 10.30 at the station. The only bus I see is 1310 which is fine but the only return I find is at 1850 which is too long to be at the ruins. Can someone tell me if this is correct in which case we will not bother with the trip.