A comparison of the coadsorption of benzyl alcohol and phenyl ethanol with the cationic surfactant, hexadecyl trimethyl ammonium bromide, C(16)TAB, at the air-water interface is made using the specular reflection of neutrons. The phenyl ethanol is more surface active than the benzyl alcohol, and competes more effectively with the C(16)TAB for the interface. The structure of the C(16)TAB component in the mixed monolayer is compared with the structure of the pure C(16)TAB monolayer at an equivalent area per molecule. The addition of the aromatic alcohol subtly alters the conformation of the C(16)TAB and draws it closer to the aqueous subphase. The center of the alcohol distribution is located in the interface adjacent to the C-6 group of the C(16)TAB alkyl chain closest to the headgroup. Compared to the benzyl alcohol, the more hydrophobic phenyl ethanol is slightly farther away from the headgroup, and has a greater impact on the conformation of the alkyl chain of the C(16)TAB.