Here is a Map of Albany showing the stockade in 1695, overlaying the contemporary arerial photo of Albany. At the top of the hill, was Fort Frederick sitting atop State Street Hill (Capitol Hill) it replaced the earlier Fort Orange along the Hudson River, offering protection for Pearl Street and lands below it. John Wolcott told me that Pearl Street was likely a corruption of "Peril Street" due to the risk of being shot by invaders down from the top of the hill.