The three covers have been posted in 1944 and are 1E3 paper. This first cover, from October 1944, does not have a censorship tape, while the other two have it.
This second cover is from June 1844. While it is not addressed to Continental Grain, it is addressed to an office in the same floor as the building Continental Grain was in, and came with the other covers from the correspondence.
The third cover is from May 1844, by which time most 2p clay stamps had been used up.
