I have twice written about a volume of Goffredo da Trani's Summa super titulos Decretalium (here and here), and its interesting provenance. The volume remained complete until the Delamarre sale in Paris in 1909, and then, by 1928, had its two large miniatures excised. One of these (the Tree of Affinity) ended up in the McCarthy collection, the other (the Tree of Consanguinity [Wikipedia]) was untraced until now.
The Wadsworth Atheneum in Hartford, Connecticut, has very few manuscripts, but I recently discovered that one of them is the long-lost miniature, shown at the top of this post.
It matches the 1909 description nicely:
“Le roi David figure dans le premier tableau avec un sceptre à chaque main; il est vêtu de rouge, bleu, vert et violet et porte une couronne d’or”
The style of decoration and script match the other miniature and the parent volume, but for anyone still sceptical, there is another conclusive piece of evidence that they belong together.
The only available image of the Wadsworth Atheneum leaf is not very high resolution, but one can just about discern the pencil folio number "145" in the upper right corner: