Two Sunderland Pottery creamware frog mugs

Two Sunderland Pottery creamware frog mugs, early 19th century, one Dixon & Co and printed with a ship at sail inscribed 'Success to the Coal Trade', the other J Phillips & Co and printed with the Mariner's Compass, each signed in the print, each mug containing a large frog climbing up the interior wall, small footrim chips, 12.5cm max. (2)