Overlay of the re-reduced density map of candidate RGB stars presented in Carlin et al. (2019) and the H I filaments observed in our data (white contours). Bins in the density map are completeness-corrected and have a resolution of 0.75 arcmin. The hole in the centre is due to extreme crowding. The colours denote the number of stars per 0.75′ bin. The stellar stream is connecting DDO 44 and NGC 2403 with the tip of the H I filaments, strongly suggesting that DDO 44 and NGC 2403 recently underwent an interaction.