Small (HCl)_m(H₂O)_n clusters have been assembled in He droplets, and their spectra in the HCl stretch range (2500−3000 cm⁻¹) have been obtained. In a recent He droplet study, a band at 2670 cm⁻¹ was assigned to the dissociated H₃O⁺(H₂O)₃Cl⁻ ion pair. In this work, we have revised the assignment of this band to a cyclic hydrogen-bonded form of the (HCl)₂(H₂O)₂ cluster based on careful measurements of the pickup pressure dependence as well as the transition moment angles associated with the HCl stretch vibrations. A number of vibrational bands due to small mixed clusters have also been observed. As the number of the captured water molecules increases, a broad feature appears that spans the 2550−2800 cm⁻¹ range. The possible origin of this spectral broadening in large (HCl)_m(H₂O)_n clusters is discussed.