Robert Telfair

• A key to Gough's Practical Arithmetic: In which all the examples necessary for a learner are wrought at large;and also, solutions given of all the questions for exercise in the various rules. Designed chiefly for the ease of schoolmasters ..
• A system of practical arithmetick, in four books
• Key to Gough's Practical arithmetic ..
• Practical arithmetic, in four books
• The following copies of writing are respectfully submitted, as calculated to lead the student on the plainest principles, from the earliest essay of the pen, to a perfect knowledge of the art ...