Some 15 years ago I did a lot of work into the various Pearson families in some parishes in Copeland in Cumberland (England) in the seventeenth century. This included the Pearsons of Ullock.
The original work was distributed on CD-ROM and has percolated through onto web pages over the years.
I've just reassessed the Pearsons of Ullock, though not the other Pearsons, and put the revised version here. This includes source material (BMD entries, probate, etc.). Probate is restricted (for publishing reasons) by the password 'probate'.
The starting page is:
http://rumbutter.info/gen-cumb-cd-pearson-dean/pearson-of-ullock
You can get to anything else from the links there.