This from François Soyer:
The Hatfield House Archives in the United KIngdom have digitises their privately held collection of almost 30,000 documents gathered by William Cecil (1520-1598), Lord Burghley and his son Robert Cecil (1563-1612), First Earl of Salisbury. These include a very large number of documents relevant to the tumultuous Anglo-Spanish relations during the reigns of Elizabeth I and James I.
They are offering a free trial of The Cecil Papers!
If you would like a free trial of The Cecil Papers or pricing information, please contact firstname.lastname@example.org<mailto:email@example.com>