It seems during Petrie's season at Tanis he also collected material from this site which he also distributed to museums. Petrie in the excavation volume admits that it is a mixture of things purchased and found that were distributed to museums.
Petrie, W. M. Flinders, Murray, A. S., and Griffith, F. LL. 1888. Nebesheh (Am) and Defenneh (Tahpanhes). Memoir of the Egypt Exploration Fund 4. London: Trübner & Co.
Links
[1] https://egyptartefacts.griffith.ox.ac.uk/resources/egypt-exploration-fund-eef
[2] https://egyptartefacts.griffith.ox.ac.uk/people/w-m-flinders-petrie
[3] https://egyptartefacts.griffith.ox.ac.uk/node/1145