Long Cecil is a single cannon, designed for Kimberley. Cecil John Long [CJL] ie a Cecil John LongTom ?? <<< just a guess with reference to the comment above -P. of L.T.S." stands for "Piece of Long Tom Shell". Similar Maltese crosses were produced for the Armoured Train Disater, stamped with the initials "A.T.D." and "FRERE 15.11.99 [by Neville_C]