In there is discussion of the claim that Lambert's proof is incomplete and requires a result by Legendre to complete it. Wallisser shows that Lambert's proof is not only complete but is an outstanding mathematical achievement for its time.
Sa may discussion ng claim na Lambert ng katibayan ay hindi kumpleto at nangangailangan ng isang resulta ng Legendre upang makumpleto ito. Wallisser ay nagpapakita na ang Lambert's patunay na ito ay hindi lamang makumpleto ngunit ito ay isang natitirang matematiko tagumpay para sa kanyang oras.