Samuel Gawith (SG) and Gawith, Hoggarth, & CO (GH&C) blends periodically suffer from droughts. Usually it's their more popular blends, but occasionally even their more obscure blends get hard to find. I keep looking for SG Grousemoor and Sam's Flake, but I haven't found any in some time. Right now it looks like GH&C blends are pretty stable though - assuming you like the floral Kendal sauce.