Thanks Christine for the info., and well figured out with notes against William's baptism, I would probably have taken it as 5/6d. !!
I've found yet another tree on Ancestry, with the same John Thompson and family, it has all the same birth dates etc., but has an Elizabeth as John' wife, but also has the children split and some listed under "unknown spouse"?? so presume he thinks John married twice, he has been on line today, so may get an answer from this one.
I really appreciate the time you have given to this, once again many thanks.
Jenny