Posted by George Wells on February 6, 2020, 2:50 pm, in reply to "Flow Blue Cashmere"
The three "imbedded dots" are what are called "stilt marks". They formed when the wet-glazed plate was placed on ceramic stilts (also referred to as "kiln furniture") to keep the plate physically separated from adjacent plates in the saggar stack. There should be three sets of three such marks on the back side of the plate corresponding to the other arms of each stilt. The "J Morley" is actually an "F Morley" that had a corner of the back-stamp pressed too deeply, making that first initial look like a "J".