I don't know if The National Archives have recently catalogued a set of proceedings in the Court of Chancery, or whether I've just overlooked them in the past, but Cornish researchers may well find it of interest to search within this set of documents. I found two cases relating to Paskow Donne/Dunn of Camborne and St. Erth dating to the period 1604 to 1622.
Unlike lipkatatar and the Paskis Lanyon case (see thread in Sancreed Seeking), I was able to get paper copies of the relevant documents for what I thought was a reasonable price of £18, which compares favourably with the cost of travelling to Kew and spending a day at TNA. I suppose it depends on how many sheets of paper they have to copy. In the Paskow Donne litigation, for each case the documentation consisted of a single sheet of paper about A2 size, which contained the plaintiff's statement - unfortunately there was nothing to say how the defendant replied or the ultimate judgement of the court.
I was very pleased with the postal service from TNA. The legibility of the copies was good, considering the age of the originals and the inevitable damage and fading. The copies arrived in good condition rolled up in a cardboard tube. Transcribing the documents involved several hours with a magnifying glass, but was worth the effort!