The Double Glide Waltz, as described by Melvin B. Gilbert in his compendium Round Dancing (Portland, Maine, 1890), is an elaboration on the alternating measures of sliding and waltzing found in variations like the Metropole. In La Danse, by [George] Washington Lopp, published in Paris in 1903, it is called La Double Boston and credited to Lopp himself. Much of La Danse is a direct French translation of Gilbert, so Lopp’s addition of the credit to himself is notable.
Like other late variations such as the Bowdoin and Fascination, the Double Glide Waltz alters the sliding steps, in this case to include in each sideways measure two “slide-closes”, one slow and one fast. The pattern here is “one, two-and-three” or “slow, quick-quick-slow”. It also reverses the Metropole pattern from slide/waltz/slide/waltz to waltz/slide/waltz/slide, a distinction which is not particularly significant when actually dancing.

