Nile Minimum

<< ARBuild.m

z = ReadData["d:/math/2006/Trench/Data/Minimum.1"];

TimeSeriesPlot[z];

Beran and Percival & Walden

Percival & Walden comment in Sec 5.7 (p. 190)

Toussoun's record extends up to 1921.  It is complete for 622-1284.  For 1285-1470 there are scattered missing values.

I recall that we linearly interpolated to complete the record.