[2] He studied law at the Universidad Mayor, Real y Pontificia de San Francisco Xavier Chuquisaca, where he graduated as a lawyer.

On the reverse, an outstretched arm, holding in the hand the tree of liberty surrounded by olive branches, with the following inscription in the circle: "To the Conservator of Peace Mariano Enrique Clavo".

[6] Considered by his contemporaries, due to the purity of his style, as one of the best prose writers in Bolivia,[7] Calvo de la Banda had referred to the Castilian-Indian legislation that governed before the Santa Cruz codes, when defending the need for this codification — quoted by the Chilean historian Alejandro Guzmán Brito[8]—in these terms: It is worth remembering the farrago that there is of them, the multiplicity of their codes, the struggle with each other, the repetition of the same provisions, the antilogy that some laws offer in their own wording and even how heavy it is and its unusual language.

The latter finally materialized (no doubt spurred by the unmistakable appearance of chaos and weakness at the helm in La Paz) in late August 1841.

With the latter the indisputable hero of the moment, Calvo could only acquiesce when Congress named the General Provisional President, once again pending a possible return of Marshall Santa Cruz.