Field images cropped on a 1′×1′ region around TOI-2084 (top row) and TOI-4184 (bottom row). The current position of the target stars is shown with the yellow circle. Top row: 1953 red image from POSS I/DSS, 1953 infrared image from POSS II/DSS2, 2012 z′ image from PanSTARRS 1, and 2021 I+z image from SPECULOOS-North (from left to right). Bottom row: 1977 blue image from POSS II/DSS2, 1989 red image from POSS II/DSS2, 1990 infrared image from POSS II/DSS2, and 2021 image z′ from SPECULOOS-South (from left to right).