The monodromy transformation $T(v_{0}w_{0}v_{1}w_{1})\colon\mathbb{Z}^{d}_{v_{0}}\rightarrow\mathbb{Z}^{d}_{v_{0}}$ along the loop $(v_{0}w_{0}v_{1}w_{1})$ is given by $T(v_{0}w_{0}v_{1}w_{1})(n)=n+\langle v_{1},n\rangle(w_{1}-w_{0})$.