A transcription is available at this site.
The will mentions:
-the testator James Jackson, yeoman
-his son John Jackson
-his grandchildren James Jackson, John Jackson, Alice Jackson, and Ellen Jackson
-Jane the now wife of James Rymer of Little London
-his grandson Henry Jackson the son of his late son Henry
-his granddaughter Alice the daughter of his late son-in-law Miles Blundell
-his other grandchildren Gilbert Blundell, James Blundell, and John Blundell (brothers of the aforesaid Alice)
-his grandson James son of his son William Jackson
-his son Peter
-his daughters Ann, Alice, and Ellen
-the husband and children of his daughter Ellen
-his executors: his son John Jackson and John Ball of North Meols
-witnesses: Edward Bradshaw, Hugh Howard, Pride
He signed with a mark.