FIG. 1: Missing mass differential cross-sections for pp → p π $^{+}$X reaction for the three lowest angles at T$_{p}$=1520 and 1805 MeV, selected for missing masses larger than 960 MeV. Data measured at SPES3 (Saturne) [3]. They have been binned into 5.6 MeV mass intervals, shifted and rescaled in order to present the six angles inside the same figure. Vertical lines indicate the mean position of the structures ( α ) M=1004 MeV, ( β ) M=1044 MeV, and ( γ ) M=1094 MeV. Narrow structures were observed in different conditions (reaction, incident energy, spectrom- eter angle, or observable) at the same masses (within ± 3 MeV) which is, in the opinion of the authors, a strong indication of their existence. A single figure (Fig. 1) is reproduced here, since it corresponds to the first observation of these exotic baryons [3], and since the corresponding masses, narrow and lying below the pion threshold mass, prove directly the exotic nature of these states. We observe three structures very well defined statistically. Several other narrow structure exotic masses were extracted from different studies done at SPES3 (Saturne). They were published in [4–6], showing data in the missing mass range: 1.0 ≤ M ≤ 1.46 GeV, 1.47 ≤ M ≤ 1.68 GeV, and 1.72 ≤ M ≤ 1.79 GeV, respectively. The values of the observed narrow structures masses are: 1004( α ), 1044( β ), 1094( γ ), 1136( δ ), 1173( ϵ ), 1210( λ ), 1249( η ), 1277( φ ), 1339( ν ), and 1384 MeV. In this work, the greek letters within parenthesis, identify the structures shown in the figures and the vertical arrows show the expected position for these narrow structures on the basis of previous observations. Some narrow structures in the mass range M$_{N}$ ≤ M ≤ 1 GeV, were also tentatively extracted [7]. Other signatures of narrow baryonic structures, were observed either in dedicated exper- iments or extracted from cross sections obtained and published by different authors. They are quoted in [4] and will not be recalled here. This reaction, like the next one p( α, α ′ )X, was studied in order to get information on the Roper resonance excitation. Less precise cross-sections for the p(d,d’)X reaction were measured at Saturne (SPES4) [8, 9] using incident deuteron beam with momentum p$_{d}$=2.95 GeV/c, at five laboratory spectrometer angles, from θ = 6 . 59 ◦ up to 11 . 95 ◦ . The III. THE P(D,D’)X REACTION 3