G. R. Francis, ‘Silver coins of the Tower Mint of Charles I’, 12 (1916), 181-94, 5 pls.; 13 (1917), 75-94, 6 pls.; 14 (1918), 57-85, 6 pls.; 15 (1919-20), 79-116, 6 pls.
H. W. Morrieson, ‘Table of the silver coins of the Tower Mint of Charles I’, 18 (1925-26), 159-63
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M. B. Sharp, ‘The Tower shillings of Charles I and their influence on the Aberystwyth issue’, 47 (1977), 102-13, 7 pls.
M. B. Sharp, ‘More on the Tower shillings of Charles I’, 50 (1980), 136, pl.
B. R. Osborne, ‘The Tower coins of Charles I’, 54 (1984), 164-209
M. Sharp, ‘New Charles I shillings of Chester and the Tower’, 54 (1984), 293
M. Sharp, ‘Further notes on the Tower shillings of Charles I’, 59 (1989), 214
M. Sharp, ‘Three seventeenth-century notes: (1). More Tower shillings of Charles I discovered; (2). An interesting Parliamentarian issue of 1642/3’, 60 (1990), 138-39, pl.
M. Sharp, ‘Notes on two coins of Charles I’, 62 (1992), 195-6, pl.
