Have completed this but am not sure if my answer to 23 across is correct as I cannot parse it "Mark Twain may be hiis answer (8) which ended as L?A??MAN and I could only find Leadsman to fit in. Is this correct, ifi so why or should I be looking for another answer?
Yes - Mark Twain took his name from the measure of depth used by leadsmen who were sounding the river depth on the Mississipi. Two fathoms was "mark twain".