В своем последнем письме к Тео Винс

В своем последнем письме к Тео Винсент признался, что, поскольку у него не было детей, то он рассматривает свои картины как потомство.

Результаты (английский) 1:

In his last letter to Theo, Vincent admitted that, since he had no children, he saw his paintings as offspring.

Результаты (английский) 2:

In his last letter to Theo, Vincent admitted that as he did not have children, then he views his paintings as offspring.

Результаты (английский) 3:

In his last letter to Theo Vincent admitted that, since he had had no children, he considers his paintings as well as offspring.