A The Hermite H-minimum and W-maximum irradiance sequence of the last 400 yrs, showing the H Maunder Minimum and centennial H Minimums of ‘1712’, Dalton and ‘1900 Minimum’ following the sequence of relative W peaks of sunspot maximums at 1705 AD, 1778 AD, 1870 AD and 1957 AD. B The loop and tail diagram of the time paths for the same sequence showing the relative sunspot maximums at the peak of the 44 yr and 88 yr loops and centennial sunspot minimums in 22 yr tails. There are four Gleissberg Cycle equivalents between the maximums at 1614 and 1957 maximums (343 yrs) which is quarter of a Bond Cycle. There is also a loop and tail symmetry between sunspot peaks 1614 AD and 1778 AD, 1778 AD to 1870 AD and 1870 to 1957 AD, all within multiples of a Gleissberg Cycle. The sunspot record for 1700 to 2009 is shown below (Source: Baker 2014).