WW1 Munitions -- Ever hear of a JJ Can?? JJ Con??

[Paul S.]

His "J"s and "G"s are quite similar, and his lower case "A"s appear very similar to his lower case "O"s. At first it appears to be GG cons. Having the second page helps since we can see more of his handwriting to begin to recognise a letter form pattern. With that, the letters are recognisable as "GG cans" which means he is writing about "Jack Johnson" shells, using the word "cans" to mean shells. Sunray suggested above that it might be "Jack Johnsons" and I believe he is right.