Two days at Charité in Berlin
Tarry Singh spent 12 and 13 February 2019 in Berlin for Charité, a third visit in thirteen months, and the surviving record is one hotel invoice and five photographs.

The paper trail for this one is thin. A single invoice from enjoy hotel Berlin City Messe on Rudolstädter Straße covers one night, room 109, 12 to 13 February 2019, made out to Tarry Singh in Assen. Nothing else sits in the folder beside it: no deck, no programme, no attendance list.
The photographs fix the afternoon. At 16:14 on 12 February the phone is in Berlin's south west, a couple of hundred metres from Charité's dental campus, inside a room of glass display cabinets built around a treatment chair from an earlier century. Tarry is in the frame with a colleague, carrying the coffee.
Berlin was familiar ground by then. A talk in January 2018, a bioinformatics hackathon a month after that, and this, thirteen months on, at the city's university hospital. The work kept being pulled towards medicine, and it kept being pulled towards the same city.
The rest of the trip reads off the timestamps. Dinner in the city's south at 19:40, a tram after nine, then a train window and wet green fields the following afternoon. What was taught at Charité, and to whom, is written down nowhere in this folder, and it is not filled in here.
One frame survives from these two days, and the host inside Charite is still being confirmed.