From 2023 display Art and Artifice: Fakes from the Collection:
While this drawing is not itself a fake, its mount and the stamp with the letter ‘M’ in a circle in the lower right corner of the sheet are forgeries. They are imitations of the collector’s mark and distinctive blue mount used by the French 18th-century collector Pierre-Jean Mariette (see video nearby). A renowned connoisseur, he owned over 9,000 drawings. Mariette’s former ownership of a drawing would confirm its quality and enhance its value.

unknown 19th-century Dutch collector or dealer (his inscription on verso); Arthur Lawrence Barnett Phillips, London (1842-1922), L.1716; Robinson & Fisher (London), 27 January 1938, part of lot 25; purchased there by Sir Robert Witt, London (1872-1952), L.2228b; Witt Bequest 1952

Art and Artifice: Fakes from the Collection, The Courtauld Gallery, London, 17/06/2023-08/10/2023

Rosenberg, Paul, Les dessins de la Collection Mariette: écoles italienne et espagnole. 4 vols, Paris 2019
vol. 3, p. 1425
ill. on p. 1425

Watermark: unable to check drawing due to mount. Mount (historic), Verso: centre left: visible in raking light but unable to discern more fully.

Inscription: Recto: within the drawing, lower right on shield, brown ink, artist’s hand: “Gianbologna / Andrea Andr[...] / Lontag[…] / Agiovan[…] / A f buono[…] / [...]”; lower right corner, black ink, encircled, a false Mariette mark L.1852: “m”. Mount (false Mariette), Recto: lower centre in a banner, black ink: “Pietro Franc.o / Morazzone / ne’ A.o 1575.”; lower right, brown ink, partly effaced: “Mariette Coll.”. Mount (false Mariette), Verso: upper left corner, graphite, crossed out: “B/b / B/b”; upper left corner, blue crayon: “x”; upper right, graphite: “#12”; upper right corner, graphite, partly cut off by tape: “[…]82.”; upper right, blue crayon: “14R” [the “R” superscript]; right upper edge, graphite, faded: “Dono h[…]”; upper right, graphite: “582”; upper centre, graphite: “Engraved on Wood / & same [“and” crossed out] exhibited at South Kensington”; centre, brown ink, crossed out in brown ink: “pordenone.”; below that, graphite: “1302[?]”; left centre edge, brown ink, belonging to Lawrence Barnett Phillipps L.1716: “1.73 LBP”; lower centre, brown ink, crossed out in brown ink: “Jean Baptiste Bolognini Diciple [sic] du Guide Ne’ Boldogne en 1611.”; below that in darker brown ink, cut off by right edge: “Pietro Franc.o Marozzone Aldus genaamis naar Lyne Geboorne plaats in’t Herto[...]. / van Milano, hij ging met zyn vader naar Romen en Geshidurde aldaar ‘t Antic ken de Werke / Raffaël en andere voornaame Meisters, verwegens Kerbrok hy naar Venetien alWaar h[…] / de werken van Tiziano, Tintoretto &. Betrachtte; naar Milano te zug kurende grande hy[…] / var zo wel als de Procaccinis en bloeyende Schilderschoole so; hy werks merde voor Savoyen, en / Vercerd met de Ridden order van St Mauricius, doch in 1626 naar Piacenza ontboden Zynde o[…] / g den Coepel van den Dom de Schilderen Weird hy Zickenlyk, kunde naar Zyn Vaderland ze zug om / ge Zondheid aldaar te herstellen, doch verlad aldaar in den ouderdom van 55 Jaarne; Zyn / Werk aan den Dom Coepel van Piacenza, is naderhand door Guerchino afgemaakt. In de / Discipels nagelanten heft Zyn duzelve my onbekend._”; added below in lighter brown ink: “Died 1626 his hist work at Como i[…] / Church of S. Giovanni, St Michael disc[…] / rebel angels”; right lower edge, graphite: “173”; right lower edge, brown ink: “90”; lower centre edge, graphite, Witt’s hand, erased: “27 / Morazzone Pietro Franco […] / 1575-1626 / Coll. Mariette”; lower centre, graphite, erased: “P […] Morazzone”; lower centre, graphite: “fine & Scarce”; lower right corner, brown ink: “Lna.”.

Collector's mark: Recto: lower right corner, written in black ink: falsified mark of Pierre-Jean Mariette (L.1852). Mount (false Mariette), Verso: left centre edge: Lawrence Barnett Phillipps (L.1716); lower left corner, stamped in black: Sir Robert Witt (L.2228b).