Thanks to Bill Sauder I have now seen actual pictures of the document mentioned in my above article. The document was said to be called 'List of Particulars', but it is actually 'Particulars of Completed Ships'. I compiled the dates from that document and the document held in the Public Records Office of Northern Ireland. Green = dates only in Particular of Completed Ships. Blue = Dates only in the record book in the PRONI. Yellow = Dates from both.