This appears to be something that stems out of medieval Catholic mysticism. Here's something from a brief Google search on the topic;Hi RonI think the legend is much older, from classical times. This link will give you some more Religious Symbols.Pelican: The Pelican is a symbol of the atonement and the Redeemer and is often found in Christian murals, frescos, paintings and stained glass. The pelican was believed to wound itself in order to feed its young with its own blood. In the hymn "Adoro Te," St. Thomas Aquinas addresses the Savior with, "Pelican of Mercy, cleanse me in Thy Precious Blood." Allusion is even made to this belief in "Hamlet" (act iv): "To his good friend thus wide I'll ope my arms And, like the kind, life-rendering pelican, Repast them with my blood."I think it likely that the church was Roman Catholic?Even in Clement's writings there are very strange ideas of natural history with wierd and wonderful creatures which we believed in. It is one of the interesting facts that the Bible is free from these legendary creatures.For some English children raised with silly nursey rhymes it is a little difficult to take the pelican seriously.A remarkable bird is the pelicanFor his beak holds more than his belly can!BTW doesn't Alcatraz mean island of the pelicans?