Earlier work on the ${\mathrm{Si}}^{28}(d, \ensuremath{\alpha}){\mathrm{Al}}^{26}$ reaction was extended and improved. The ground state $Q$-value of the reaction was remeasured and found to be 1.428\ifmmode\pm\else\textpm\fi{}0.004 Mev. Levels were found with excitation energies of (in Mev) 0.229\ifmmode\pm\else\textpm\fi{}0.003, 0.418\ifmmode\pm\else\textpm\fi{}0.002, 1.060\ifmmode\pm\else\textpm\fi{}0.002, 1.762\ifmmode\pm\else\textpm\fi{}0.003, 1.853\ifmmode\pm\else\textpm\fi{}0.003, 2.073\ifmmode\pm\else\textpm\fi{}0.003, 2.368\ifmmode\pm\else\textpm\fi{}0.003, 2.548\ifmmode\pm\else\textpm\fi{}0.004, 2.663\ifmmode\pm\else\textpm\fi{}0.004, 2.741\ifmmode\pm\else\textpm\fi{}0.005, 2.916\ifmmode\pm\else\textpm\fi{}0.006, 3.075\ifmmode\pm\else\textpm\fi{}0.006, 3.160\ifmmode\pm\else\textpm\fi{}0.006, 3.407\ifmmode\pm\else\textpm\fi{}0.006, 3.510\ifmmode\pm\else\textpm\fi{}0.010, and 3.596\ifmmode\pm\else\textpm\fi{}0.010. Seven of these have not been reported previously. The yields of the reaction leading to the ground state, the first excited state, and the second excited state were measured as a function of bombarding energy in the range 5.5 Mev to 7.5 Mev. There is strong resonance structure. The angular distributions for the reaction leading to these three states were obtained at 7.03 Mev bombarding energy. At this energy the total yield of the isotopic-spin forbidden reaction leading to the first excited state is 10% of the yield to the ground state. This violation of the selection rule can be explained by Coulomb force effects. The second $T=1$ level could not be observed and the previous suggestion that the level at 3.16 Mev is the third $T=1$ level seems to be incorrect. A comparison of the data with the results of other experiments is made. Energy levels of ${\mathrm{Al}}^{27}$ seen in the ${\mathrm{Si}}^{29}(d, \ensuremath{\alpha}){\mathrm{Al}}^{27}$ reaction are listed and compared with results from ${\mathrm{Al}}^{27}(p, {p}^{\ensuremath{'}}){\mathrm{Al}}^{27*}$. A new level at 5.745\ifmmode\pm\else\textpm\fi{}0.012 Mev was found plus several levels above the range of excitation previously covered.