On the Supporting Materials
It is referred two key early Gabor’s papers in the development of Hologragy: one in Nature (1948), and another one in the Proceedings of the Royal Society (1949). However, this second paper was, indeed, the first part of a two-part work carried out by Gabor. The second part of that paper was published in 1951 in the Proceedings of the Physical Society. The reference is: "Microscopy by Reconstructed Wavefronts, part II”, Proc. Phys. Soc, Section B, Vol. 64, n. 6, pp 449-469, 1951 (doi:10.1088/0370-1301/64/6/301). Then, my recommendation would be to include this third paper as a supporting material too.