ern ▁whether ▁St . ▁Anne ▁is ▁a ▁full ▁generation ▁older ▁than ▁Mary . ▁Fre ud ▁also ▁points ▁out ▁that , ▁in ▁the ▁painting , ▁the ▁outline ▁of ▁a ▁v ulture ▁can ▁be ▁seen . ▁This ▁is ▁connected ▁to ▁the ▁original ▁fant asy ▁involving ▁the ▁v ulture ▁in ▁Leon ardo ▁da ▁V inci ' s ▁c rib . ▁ ▁S ources ▁c ited ▁ ▁See ▁also ▁Psych obi ography ▁ ▁Further ▁reading ▁▁▁▁▁ ▁Meyer ▁Sch api ro . ▁Leon ardo ▁and ▁Fre ud : ▁An ▁Art - H istor ical ▁Study . ▁In ▁Journal ▁of ▁the ▁History ▁of ▁Ide as , ▁Vol . ▁ 1 7 , ▁No . ▁ 2 ▁( A pr ., ▁ 1 9 5 6 ), ▁pp . ▁ 1 4 7 - 1 7 8 . ▁ ▁Sig mund ▁Fre ud . ▁" E ine ▁Kind heit ser inner ung ▁des ▁Leon ardo ▁da ▁V inci ▁( 1 9 1 0 ). " ▁Studien aus gabe . ▁Vol . ▁ 1 0 : ▁Bild ende ▁Kunst ▁und ▁Literatur . ▁pp .   8 7 – 1 6 0 , ▁Frankfurt / Main ▁ 1 9 6 9 . ▁ ▁Wayne ▁Anders en . ▁" Le on ardo ▁da ▁V inci ▁and ▁the ▁S lip ▁of ▁F ools ." ▁History ▁of ▁European ▁Ide as ▁Vol . ▁ 1 8 ▁No . ▁ 1 , ▁pp .   6 1 – 7 8 , ▁ 1 9 9 4 . ▁ ▁Wayne ▁Anders en . ▁Fre ud , ▁Leon ardo