Keith, W. (1725). A letter from Sir William Keith, bart., governour of Pennsylvania, to Mr. James Logan, secretary to the proprietorship of the said province, on occasion of Mr. Logan's having sent to Sir William a copy of his printed paper, called The antidote. Philadelphia: Printed and sold by Andrew Bradford.

Keith, William. A Letter From Sir William Keith, Bart., Governour of Pennsylvania, to Mr. James Logan, Secretary to the Proprietorship of the Said Province, On Occasion of Mr. Logan's Having Sent to Sir William a Copy of His Printed Paper, Called The Antidote. Philadelphia: Printed and sold by Andrew Bradford, 1725.

Keith, William. A Letter From Sir William Keith, Bart., Governour of Pennsylvania, to Mr. James Logan, Secretary to the Proprietorship of the Said Province, On Occasion of Mr. Logan's Having Sent to Sir William a Copy of His Printed Paper, Called The Antidote. Philadelphia: Printed and sold by Andrew Bradford, 1725.