Margo Guryan wrote several quite famous songs in the 60s, the most famous of which are probably 'Sunday Morning' (made famous by Spanky and our Gang; also recorded by Julie London and others) and 'Think of Rain' (recorded by Claudine Longet, among others).
After the incredibly brilliant reissue of Margo's solo LP, 'Take a Picture', Franklin Castle released a compilation of Margo Guryan's demos. This is the standout track on that disc, a very spare and funky number with a cool organ sound, nice drums and catchy vocals. As would be expected from a recording intended only as a demo, this is a little rougher sounding than the studio LP, but it's a brilliant song. I wonder if anyone else ever recorded it...